diff --git a/src/OpenMesh/Core/IO/reader/OFFReader.cc b/src/OpenMesh/Core/IO/reader/OFFReader.cc
index fa02960c..896b9994 100644
--- a/src/OpenMesh/Core/IO/reader/OFFReader.cc
+++ b/src/OpenMesh/Core/IO/reader/OFFReader.cc
@@ -64,6 +64,7 @@
 #include <iostream>
 #include <fstream>
 #include <memory>
+#include <cstring>
 
 #if defined(OM_CC_MIPS)
 #  include <ctype.h>
diff --git a/src/OpenMesh/Tools/VDPM/VHierarchyWindow.cc b/src/OpenMesh/Tools/VDPM/VHierarchyWindow.cc
index 329397e6..fa1fee82 100644
--- a/src/OpenMesh/Tools/VDPM/VHierarchyWindow.cc
+++ b/src/OpenMesh/Tools/VDPM/VHierarchyWindow.cc
@@ -57,6 +57,8 @@
 
 #include <OpenMesh/Tools/VDPM/VHierarchyWindow.hh>
 
+#include <cstring>
+
 #ifndef WIN32
 #else
   #if defined(__MINGW32__)