diff --git a/src/osgPlugins/iges/ReaderWriterIGES.cpp b/src/osgPlugins/iges/ReaderWriterIGES.cpp
index 1826be715..079016e67 100644
--- a/src/osgPlugins/iges/ReaderWriterIGES.cpp
+++ b/src/osgPlugins/iges/ReaderWriterIGES.cpp
@@ -66,7 +66,6 @@
 #include <TDF_LabelSequence.hxx>
 #include <TDF_ChildIterator.hxx>
 
-#include <XSDRAW.hxx>
 #include <Quantity_Color.hxx>
 
 // osg headers
diff --git a/src/osgPlugins/iges/ReaderWriterIGES.h b/src/osgPlugins/iges/ReaderWriterIGES.h
index 953e73945..cc982cf57 100644
--- a/src/osgPlugins/iges/ReaderWriterIGES.h
+++ b/src/osgPlugins/iges/ReaderWriterIGES.h
@@ -24,9 +24,11 @@
 /// \brief header file for creating osgdb plugin for IGES format
 /// \author Abhishek Bansal, Engineer Graphics, vizExperts India Pvt. Ltd. 
 
+#ifdef WIN32
 /// \brief preproccessor macro required for compilation with open cascade
 /// \todo not sure what it does
 #define WNT
+#endif
 
 #include <TDF_LabelSequence.hxx>
 
@@ -137,4 +139,4 @@ namespace IGES
     };
 } // namespace
 
-#endif // _READERWRITERIGES_H_
\ No newline at end of file
+#endif // _READERWRITERIGES_H_