diff --git a/src/OpenMesh/Apps/QtViewer/QGLViewerWidget.cc b/src/OpenMesh/Apps/QtViewer/QGLViewerWidget.cc
index 67400df4..817df274 100644
--- a/src/OpenMesh/Apps/QtViewer/QGLViewerWidget.cc
+++ b/src/OpenMesh/Apps/QtViewer/QGLViewerWidget.cc
@@ -53,6 +53,7 @@
 #endif
 
 #include <iomanip>
+#include <iostream>
 #include <sstream>
 #include <algorithm>
 // --------------------
@@ -62,12 +63,11 @@
 #  include <GL/glut.h>
 #endif
 // --------------------
-#include <qnamespace.h>
-#include <qapplication.h>
-#include <qmenu.h>
-#include <qcursor.h>
-#include <qimage.h>
-#include <qdatetime.h>
+#include <QApplication>
+#include <QMenu>
+#include <QCursor>
+#include <QImage>
+#include <QDateTime>
 #include <QMouseEvent>
 // --------------------
 #include <OpenMesh/Apps/QtViewer/QGLViewerWidget.hh>
diff --git a/src/OpenMesh/Core/Geometry/VectorT.hh b/src/OpenMesh/Core/Geometry/VectorT.hh
index 0b18b43d..45614868 100644
--- a/src/OpenMesh/Core/Geometry/VectorT.hh
+++ b/src/OpenMesh/Core/Geometry/VectorT.hh
@@ -69,7 +69,7 @@
 
 
 #include <OpenMesh/Core/System/config.h>
-#include <iostream>
+#include <ostream>
 #include <cmath>
 #include <cassert>
 #include <cstring>
diff --git a/src/OpenMesh/Core/IO/BinaryHelper.cc b/src/OpenMesh/Core/IO/BinaryHelper.cc
index 2080d977..505c9234 100644
--- a/src/OpenMesh/Core/IO/BinaryHelper.cc
+++ b/src/OpenMesh/Core/IO/BinaryHelper.cc
@@ -60,6 +60,7 @@
 #include <OpenMesh/Core/System/config.h>
 // -------------------- STL
 #include <algorithm>
+#include <iostream>
 // -------------------- OpenMesh
 #include <OpenMesh/Core/IO/BinaryHelper.hh>
 
diff --git a/src/OpenMesh/Core/IO/BinaryHelper.hh b/src/OpenMesh/Core/IO/BinaryHelper.hh
index f95c97d1..3e36e952 100644
--- a/src/OpenMesh/Core/IO/BinaryHelper.hh
+++ b/src/OpenMesh/Core/IO/BinaryHelper.hh
@@ -66,7 +66,7 @@
 #else
 #  include <cstdio>
 #endif
-#include <iostream>
+#include <iosfwd>
 // -------------------- OpenMesh
 
 
diff --git a/src/OpenMesh/Core/IO/IOManager.cc b/src/OpenMesh/Core/IO/IOManager.cc
index ae77e2bf..bc7b01b2 100644
--- a/src/OpenMesh/Core/IO/IOManager.cc
+++ b/src/OpenMesh/Core/IO/IOManager.cc
@@ -60,6 +60,8 @@
 #include <OpenMesh/Core/System/config.h>
 #include <OpenMesh/Core/IO/IOManager.hh>
 
+#include <iostream>
+
 
 //== NAMESPACES ===============================================================
 
diff --git a/src/OpenMesh/Core/IO/IOManager.hh b/src/OpenMesh/Core/IO/IOManager.hh
index ccd5e0c8..58c157f4 100644
--- a/src/OpenMesh/Core/IO/IOManager.hh
+++ b/src/OpenMesh/Core/IO/IOManager.hh
@@ -60,7 +60,7 @@
 
 
 // STL
-#include <iostream>
+#include <iosfwd>
 #include <sstream>
 #include <string>
 #include <set>
diff --git a/src/OpenMesh/Core/IO/reader/BaseReader.cc b/src/OpenMesh/Core/IO/reader/BaseReader.cc
index b7f30f84..0f633215 100644
--- a/src/OpenMesh/Core/IO/reader/BaseReader.cc
+++ b/src/OpenMesh/Core/IO/reader/BaseReader.cc
@@ -53,7 +53,6 @@
 #include <OpenMesh/Core/IO/reader/BaseReader.hh>
 #include <algorithm>
 #include <string>
-#include <iterator>
 #if defined(OM_CC_MIPS)
 #  include <ctype.h>
 #else
diff --git a/src/OpenMesh/Core/IO/reader/BaseReader.hh b/src/OpenMesh/Core/IO/reader/BaseReader.hh
index 987ca8a8..d1eddfc9 100644
--- a/src/OpenMesh/Core/IO/reader/BaseReader.hh
+++ b/src/OpenMesh/Core/IO/reader/BaseReader.hh
@@ -62,10 +62,11 @@
 
 
 // STD C++
-#include <iostream>
+#include <iosfwd>
 #include <string>
 #include <cctype>
 #include <functional>
+#include <algorithm>
 
 // OpenMesh
 #include <OpenMesh/Core/System/config.h>
diff --git a/src/OpenMesh/Core/IO/reader/OBJReader.cc b/src/OpenMesh/Core/IO/reader/OBJReader.cc
index c6139222..47345a44 100644
--- a/src/OpenMesh/Core/IO/reader/OBJReader.cc
+++ b/src/OpenMesh/Core/IO/reader/OBJReader.cc
@@ -71,7 +71,9 @@ using std::isspace;
 #include <string.h>
 #endif
 
-#include <set>
+#include <istream>
+#include <fstream>
+#include <vector>
 #include <algorithm>
 #include <functional>
 
diff --git a/src/OpenMesh/Core/IO/reader/OBJReader.hh b/src/OpenMesh/Core/IO/reader/OBJReader.hh
index 453d3b11..d1fb0f39 100644
--- a/src/OpenMesh/Core/IO/reader/OBJReader.hh
+++ b/src/OpenMesh/Core/IO/reader/OBJReader.hh
@@ -61,11 +61,9 @@
 //=== INCLUDES ================================================================
 
 
-#include <iostream>
+#include <iosfwd>
 #include <string>
-#include <vector>
 #include <map>
-#include <fstream>
 
 #include <OpenMesh/Core/System/config.h>
 #include <OpenMesh/Core/Utils/SingletonT.hh>
diff --git a/src/OpenMesh/Core/IO/reader/OFFReader.cc b/src/OpenMesh/Core/IO/reader/OFFReader.cc
index 36ac4c74..c7c47f5d 100644
--- a/src/OpenMesh/Core/IO/reader/OFFReader.cc
+++ b/src/OpenMesh/Core/IO/reader/OFFReader.cc
@@ -65,7 +65,6 @@
 
 //STL
 #include <iostream>
-#include <ios>
 #include <fstream>
 #include <memory>
 
diff --git a/src/OpenMesh/Core/IO/reader/OFFReader.hh b/src/OpenMesh/Core/IO/reader/OFFReader.hh
index 3069bab8..da069f4e 100644
--- a/src/OpenMesh/Core/IO/reader/OFFReader.hh
+++ b/src/OpenMesh/Core/IO/reader/OFFReader.hh
@@ -61,10 +61,9 @@
 //=== INCLUDES ================================================================
 
 
-#include <iostream>
+#include <iosfwd>
 #include <string>
-#include <stdio.h>
-#include <fstream>
+#include <cstdio>
 
 #include <OpenMesh/Core/System/config.h>
 #include <OpenMesh/Core/Utils/SingletonT.hh>
diff --git a/src/OpenMesh/Core/IO/reader/OMReader.cc b/src/OpenMesh/Core/IO/reader/OMReader.cc
index 3b544ae4..031d85e8 100644
--- a/src/OpenMesh/Core/IO/reader/OMReader.cc
+++ b/src/OpenMesh/Core/IO/reader/OMReader.cc
@@ -51,6 +51,8 @@
 
 
 //STL
+#include <vector>
+#include <istream>
 #include <fstream>
 
 // OpenMesh
diff --git a/src/OpenMesh/Core/IO/reader/OMReader.hh b/src/OpenMesh/Core/IO/reader/OMReader.hh
index a2526738..4b1f67db 100644
--- a/src/OpenMesh/Core/IO/reader/OMReader.hh
+++ b/src/OpenMesh/Core/IO/reader/OMReader.hh
@@ -69,7 +69,7 @@
 #include <OpenMesh/Core/IO/reader/BaseReader.hh>
 
 // STD C++
-#include <iostream>
+#include <iosfwd>
 #include <string>
 
 
diff --git a/src/OpenMesh/Core/IO/reader/PLYReader.cc b/src/OpenMesh/Core/IO/reader/PLYReader.cc
index ff89de33..da109694 100644
--- a/src/OpenMesh/Core/IO/reader/PLYReader.cc
+++ b/src/OpenMesh/Core/IO/reader/PLYReader.cc
@@ -61,6 +61,7 @@
 
 //STL
 #include <fstream>
+#include <iostream>
 #include <memory>
 
 #ifndef WIN32
diff --git a/src/OpenMesh/Core/IO/reader/PLYReader.hh b/src/OpenMesh/Core/IO/reader/PLYReader.hh
index 7045b745..33e486f3 100644
--- a/src/OpenMesh/Core/IO/reader/PLYReader.hh
+++ b/src/OpenMesh/Core/IO/reader/PLYReader.hh
@@ -61,10 +61,10 @@
 //=== INCLUDES ================================================================
 
 
-#include <iostream>
+
+#include <iosfwd>
 #include <string>
-#include <stdio.h>
-#include <fstream>
+#include <cstdio>
 #include <vector>
 
 #include <OpenMesh/Core/System/config.h>
diff --git a/src/OpenMesh/Core/IO/writer/BaseWriter.cc b/src/OpenMesh/Core/IO/writer/BaseWriter.cc
index 9eebb102..e20b7d8c 100644
--- a/src/OpenMesh/Core/IO/writer/BaseWriter.cc
+++ b/src/OpenMesh/Core/IO/writer/BaseWriter.cc
@@ -54,7 +54,6 @@
 #include <OpenMesh/Core/IO/writer/BaseWriter.hh>
 #include <algorithm>
 #include <string>
-#include <iterator>
 #if defined(OM_CC_MIPS)
 #  include <ctype.h>
 #else
diff --git a/src/OpenMesh/Core/IO/writer/BaseWriter.hh b/src/OpenMesh/Core/IO/writer/BaseWriter.hh
index 7980cc10..3e1688f0 100644
--- a/src/OpenMesh/Core/IO/writer/BaseWriter.hh
+++ b/src/OpenMesh/Core/IO/writer/BaseWriter.hh
@@ -62,7 +62,7 @@
 
 
 // STD C++
-#include <iostream>
+#include <iosfwd>
 #include <string>
 
 // OpenMesh
diff --git a/src/OpenMesh/Core/IO/writer/OMWriter.cc b/src/OpenMesh/Core/IO/writer/OMWriter.cc
index 244e16d9..b6004f4e 100644
--- a/src/OpenMesh/Core/IO/writer/OMWriter.cc
+++ b/src/OpenMesh/Core/IO/writer/OMWriter.cc
@@ -60,6 +60,9 @@
 #endif
 
 #include <fstream>
+#include <ostream>
+#include <vector>
+
 // -------------------- OpenMesh
 #include <OpenMesh/Core/IO/OMFormat.hh>
 #include <OpenMesh/Core/System/omstream.hh>
diff --git a/src/OpenMesh/Core/IO/writer/OMWriter.hh b/src/OpenMesh/Core/IO/writer/OMWriter.hh
index 373819f5..efc48a8c 100644
--- a/src/OpenMesh/Core/IO/writer/OMWriter.hh
+++ b/src/OpenMesh/Core/IO/writer/OMWriter.hh
@@ -62,7 +62,7 @@
 
 
 // STD C++
-#include <iostream>
+#include <iosfwd>
 #include <string>
 
 // OpenMesh
diff --git a/src/OpenMesh/Core/IO/writer/PLYWriter.cc b/src/OpenMesh/Core/IO/writer/PLYWriter.cc
index 187349a5..599ffcc1 100644
--- a/src/OpenMesh/Core/IO/writer/PLYWriter.cc
+++ b/src/OpenMesh/Core/IO/writer/PLYWriter.cc
@@ -59,6 +59,8 @@
 
 #include <OpenMesh/Core/IO/SR_store.hh>
 
+#include <iostream>
+
 //=== NAMESPACES ==============================================================
 
 
diff --git a/src/OpenMesh/Core/Mesh/BaseKernel.cc b/src/OpenMesh/Core/Mesh/BaseKernel.cc
index f6c8c147..c0e174f3 100644
--- a/src/OpenMesh/Core/Mesh/BaseKernel.cc
+++ b/src/OpenMesh/Core/Mesh/BaseKernel.cc
@@ -47,9 +47,15 @@
 \*===========================================================================*/
 
 #include <OpenMesh/Core/Mesh/BaseKernel.hh>
+#include <iostream>
+
 namespace OpenMesh
 {
 
+void BaseKernel::property_stats() const
+{
+  property_stats(std::clog);
+}
 void BaseKernel::property_stats(std::ostream& _ostr) const
 {
   const PropertyContainer::Properties& vps = vprops_.properties();
@@ -168,6 +174,10 @@ void BaseKernel::mprop_stats( std::string& _string ) const
 
 }
 
+void BaseKernel::vprop_stats() const
+{
+  vprop_stats(std::clog);
+}
 void BaseKernel::vprop_stats(std::ostream& _ostr ) const
 {
   PropertyContainer::Properties::const_iterator it;
@@ -176,7 +186,10 @@ void BaseKernel::vprop_stats(std::ostream& _ostr ) const
     *it == NULL ? (void)(_ostr << "[deleted]" << "\n") : (*it)->stats(_ostr);
 
 }
-
+void BaseKernel::hprop_stats() const
+{
+  hprop_stats(std::clog);
+}
 void BaseKernel::hprop_stats(std::ostream& _ostr ) const
 {
   PropertyContainer::Properties::const_iterator it;
@@ -185,6 +198,10 @@ void BaseKernel::hprop_stats(std::ostream& _ostr ) const
     *it == NULL ? (void)(_ostr << "[deleted]" << "\n") : (*it)->stats(_ostr);
 
 }
+void BaseKernel::eprop_stats() const
+{
+  eprop_stats(std::clog);
+}
 void BaseKernel::eprop_stats(std::ostream& _ostr ) const
 {
   PropertyContainer::Properties::const_iterator it;
@@ -193,6 +210,10 @@ void BaseKernel::eprop_stats(std::ostream& _ostr ) const
     *it == NULL ? (void)(_ostr << "[deleted]" << "\n") : (*it)->stats(_ostr);
 
 }
+void BaseKernel::fprop_stats() const
+{
+  fprop_stats(std::clog);
+}
 void BaseKernel::fprop_stats(std::ostream& _ostr ) const
 {
   PropertyContainer::Properties::const_iterator it;
@@ -201,6 +222,10 @@ void BaseKernel::fprop_stats(std::ostream& _ostr ) const
     *it == NULL ? (void)(_ostr << "[deleted]" << "\n") : (*it)->stats(_ostr);
 
 }
+void BaseKernel::mprop_stats() const
+{
+  mprop_stats(std::clog);
+}
 void BaseKernel::mprop_stats(std::ostream& _ostr ) const
 {
   PropertyContainer::Properties::const_iterator it;
diff --git a/src/OpenMesh/Core/Mesh/BaseKernel.hh b/src/OpenMesh/Core/Mesh/BaseKernel.hh
index df9545e5..9c6d95af 100644
--- a/src/OpenMesh/Core/Mesh/BaseKernel.hh
+++ b/src/OpenMesh/Core/Mesh/BaseKernel.hh
@@ -66,6 +66,7 @@
 #include <vector>
 #include <string>
 #include <algorithm>
+#include <iosfwd>
 // --------------------
 #include <OpenMesh/Core/Utils/PropertyContainer.hh>
 
@@ -688,7 +689,9 @@ protected: //------------------------------------------- synchronize properties
 
 public:
 
-  void property_stats(std::ostream& _ostr = std::clog) const;
+  // uses std::clog as output stream
+  void property_stats() const;
+  void property_stats(std::ostream& _ostr) const;
 
   void vprop_stats( std::string& _string ) const;
   void hprop_stats( std::string& _string ) const;
@@ -696,11 +699,18 @@ public:
   void fprop_stats( std::string& _string ) const;
   void mprop_stats( std::string& _string ) const;
 
-  void vprop_stats(std::ostream& _ostr = std::clog) const;
-  void hprop_stats(std::ostream& _ostr = std::clog) const;
-  void eprop_stats(std::ostream& _ostr = std::clog) const;
-  void fprop_stats(std::ostream& _ostr = std::clog) const;
-  void mprop_stats(std::ostream& _ostr = std::clog) const;
+  // uses std::clog as output stream
+  void vprop_stats() const;
+  void hprop_stats() const;
+  void eprop_stats() const;
+  void fprop_stats() const;
+  void mprop_stats() const;
+
+  void vprop_stats(std::ostream& _ostr) const;
+  void hprop_stats(std::ostream& _ostr) const;
+  void eprop_stats(std::ostream& _ostr) const;
+  void fprop_stats(std::ostream& _ostr) const;
+  void mprop_stats(std::ostream& _ostr) const;
 
 public:
 
diff --git a/src/OpenMesh/Core/Mesh/Handles.hh b/src/OpenMesh/Core/Mesh/Handles.hh
index 3e832d7a..24eb3264 100644
--- a/src/OpenMesh/Core/Mesh/Handles.hh
+++ b/src/OpenMesh/Core/Mesh/Handles.hh
@@ -53,7 +53,7 @@
 //== INCLUDES =================================================================
 
 #include <OpenMesh/Core/System/config.h>
-#include <iostream>
+#include <ostream>
 
 
 //== NAMESPACES ===============================================================
diff --git a/src/OpenMesh/Core/System/mostream.hh b/src/OpenMesh/Core/System/mostream.hh
index b58c2da0..a0367251 100644
--- a/src/OpenMesh/Core/System/mostream.hh
+++ b/src/OpenMesh/Core/System/mostream.hh
@@ -59,7 +59,7 @@
 //== INCLUDES =================================================================
 
 #include <OpenMesh/Core/System/config.h>
-#include <iostream>
+#include <ostream>
 #if defined( OM_CC_GCC ) && OM_CC_VERSION < 30000
 #  include <streambuf.h>
 #else
diff --git a/src/OpenMesh/Core/System/omstream.cc b/src/OpenMesh/Core/System/omstream.cc
index 8140fa8b..79554c15 100644
--- a/src/OpenMesh/Core/System/omstream.cc
+++ b/src/OpenMesh/Core/System/omstream.cc
@@ -56,6 +56,7 @@
 //== INCLUDES =================================================================
 
 #include <OpenMesh/Core/System/omstream.hh>
+#include <iostream>
 
 
 //== IMPLEMENTATION ========================================================== 
diff --git a/src/OpenMesh/Core/Utils/BaseProperty.cc b/src/OpenMesh/Core/Utils/BaseProperty.cc
index 7baaca9c..3e9b3cba 100644
--- a/src/OpenMesh/Core/Utils/BaseProperty.cc
+++ b/src/OpenMesh/Core/Utils/BaseProperty.cc
@@ -47,7 +47,7 @@
 \*===========================================================================*/
 
 #include <OpenMesh/Core/Utils/BaseProperty.hh>
-#include <iostream>
+#include <ostream>
 
 namespace OpenMesh
 {
diff --git a/src/OpenMesh/Core/Utils/Endian.cc b/src/OpenMesh/Core/Utils/Endian.cc
index c8e122ff..c4fb3146 100644
--- a/src/OpenMesh/Core/Utils/Endian.cc
+++ b/src/OpenMesh/Core/Utils/Endian.cc
@@ -57,8 +57,6 @@
 //== INCLUDES =================================================================
 
 
-#include <iostream>
-#include <algorithm>
 #include <OpenMesh/Core/Utils/Endian.hh>
 
 
diff --git a/src/OpenMesh/Core/Utils/Endian.hh b/src/OpenMesh/Core/Utils/Endian.hh
index 1fd61a23..e511c00a 100644
--- a/src/OpenMesh/Core/Utils/Endian.hh
+++ b/src/OpenMesh/Core/Utils/Endian.hh
@@ -62,7 +62,6 @@
 
 
 #include <OpenMesh/Core/System/config.h>
-#include <iostream>
 
 
 //== NAMESPACES ===============================================================
diff --git a/src/OpenMesh/Core/Utils/Property.hh b/src/OpenMesh/Core/Utils/Property.hh
index 68a6bbec..ab26d9d3 100644
--- a/src/OpenMesh/Core/Utils/Property.hh
+++ b/src/OpenMesh/Core/Utils/Property.hh
@@ -299,8 +299,6 @@ public:
       ++bytes;
     }
 
-    std::cout << std::endl;
-
     assert( bytes == size_of() );
 
     return bytes;
@@ -339,8 +337,6 @@ public:
       ++bytes;
     }
 
-    std::cout << std::endl;
-
     return bytes;
   }
 
diff --git a/src/OpenMesh/Core/Utils/SingletonT.hh b/src/OpenMesh/Core/Utils/SingletonT.hh
index c8617f4c..b0745c40 100644
--- a/src/OpenMesh/Core/Utils/SingletonT.hh
+++ b/src/OpenMesh/Core/Utils/SingletonT.hh
@@ -65,7 +65,6 @@
 
 // STL
 #include <stdexcept>
-#include <iostream>
 
 
 //== NAMESPACES ===============================================================
diff --git a/src/OpenMesh/Core/Utils/vector_cast.hh b/src/OpenMesh/Core/Utils/vector_cast.hh
index a93590e6..10b25dd3 100644
--- a/src/OpenMesh/Core/Utils/vector_cast.hh
+++ b/src/OpenMesh/Core/Utils/vector_cast.hh
@@ -64,8 +64,6 @@
 #include <OpenMesh/Core/System/config.h>
 #include <OpenMesh/Core/Utils/vector_traits.hh>
 #include <OpenMesh/Core/Utils/GenProg.hh>
-#include <iostream>
-#include <algorithm>
 #include <OpenMesh/Core/Geometry/VectorT.hh>
 
 
diff --git a/src/OpenMesh/Tools/Subdivider/Adaptive/Composite/CompositeT.cc b/src/OpenMesh/Tools/Subdivider/Adaptive/Composite/CompositeT.cc
index 85cd87eb..049f5680 100644
--- a/src/OpenMesh/Tools/Subdivider/Adaptive/Composite/CompositeT.cc
+++ b/src/OpenMesh/Tools/Subdivider/Adaptive/Composite/CompositeT.cc
@@ -63,6 +63,7 @@
 
 #include <OpenMesh/Core/System/config.hh>
 #include <OpenMesh/Core/System/omstream.hh>
+#include <ostream>
 #include <OpenMesh/Tools/Subdivider/Adaptive/Composite/CompositeT.hh>
 #include <OpenMesh/Tools/Subdivider/Adaptive/Composite/RuleInterfaceT.hh>
 
@@ -135,7 +136,7 @@ initialize( void )
 
   if (n_subdiv_rules_ != 1)
   {
-    std::cerr << "Error! More than one subdivision rules not allowed!\n";
+    ::omerr() << "Error! More than one subdivision rules not allowed!\n";
     return false;
   }
 
diff --git a/src/OpenMesh/Tools/Utils/MeshCheckerT.hh b/src/OpenMesh/Tools/Utils/MeshCheckerT.hh
index 0b00084f..9db382d2 100644
--- a/src/OpenMesh/Tools/Utils/MeshCheckerT.hh
+++ b/src/OpenMesh/Tools/Utils/MeshCheckerT.hh
@@ -58,7 +58,7 @@
 #include <OpenMesh/Core/System/omstream.hh>
 #include <OpenMesh/Core/Utils/GenProg.hh>
 #include <OpenMesh/Core/Mesh/Attributes.hh>
-#include <iostream>
+#include <ostream>
 
 
 //== NAMESPACES ===============================================================
diff --git a/src/OpenMesh/Tools/Utils/Timer.hh b/src/OpenMesh/Tools/Utils/Timer.hh
index 4c6898cb..15c736a6 100644
--- a/src/OpenMesh/Tools/Utils/Timer.hh
+++ b/src/OpenMesh/Tools/Utils/Timer.hh
@@ -59,7 +59,7 @@
 
 #include <OpenMesh/Core/System/config.hh>
 //
-#include <iostream>
+#include <ostream>
 #include <string>
 #if defined(OM_CC_MIPS)
 #  include <assert.h>
diff --git a/src/OpenMesh/Tools/VDPM/ViewingParameters.cc b/src/OpenMesh/Tools/VDPM/ViewingParameters.cc
index f7d1f7b3..d6a4a11e 100644
--- a/src/OpenMesh/Tools/VDPM/ViewingParameters.cc
+++ b/src/OpenMesh/Tools/VDPM/ViewingParameters.cc
@@ -56,6 +56,7 @@
 //== INCLUDES =================================================================
 
 #include <OpenMesh/Tools/VDPM/ViewingParameters.hh>
+#include <iostream>
 
 //== NAMESPACES ===============================================================