diff --git a/src/OpenMesh/Core/Utils/Property.hh b/src/OpenMesh/Core/Utils/Property.hh
index d896e1b8..7f913ec1 100644
--- a/src/OpenMesh/Core/Utils/Property.hh
+++ b/src/OpenMesh/Core/Utils/Property.hh
@@ -396,8 +396,8 @@ public:
 
 public:
 
-  explicit PropertyT(const std::string& _name = "<unknown>")
-    : BaseProperty(_name)
+  explicit PropertyT(const std::string& _name = "<unknown>", const std::string& _internal_type_name="" )
+    : BaseProperty(_name, _internal_type_name)
   { }
 
 public: // inherited from BaseProperty
diff --git a/src/OpenMesh/Core/Utils/PropertyContainer.hh b/src/OpenMesh/Core/Utils/PropertyContainer.hh
index 6d9506c0..297d16b9 100644
--- a/src/OpenMesh/Core/Utils/PropertyContainer.hh
+++ b/src/OpenMesh/Core/Utils/PropertyContainer.hh
@@ -45,7 +45,7 @@
 #define OPENMESH_PROPERTYCONTAINER
 
 #include <OpenMesh/Core/Utils/Property.hh>
-#include <OpenMesh/Core/Utils/TypeName.hh>
+#include <OpenMesh/Core/Utils/typename.hh>
 
 //-----------------------------------------------------------------------------
 namespace OpenMesh
diff --git a/src/OpenMesh/Core/Utils/typename.hh b/src/OpenMesh/Core/Utils/typename.hh
index 3dd4ba30..8c6ba8bc 100644
--- a/src/OpenMesh/Core/Utils/typename.hh
+++ b/src/OpenMesh/Core/Utils/typename.hh
@@ -1,5 +1,4 @@
-#ifndef TYPENAME_HH
-#define TYPENAME_HH
+#pragma once
 
 /// Get an internal name for a type
 /// Important, this is depends on compilers and versions, do NOT se in file formats!
@@ -25,5 +24,3 @@ std::string get_type_name()
 }
 
 }
-
-#endif // TYPENAME_HH