diff --git a/src/Mod/Import/App/PreCompiled.h b/src/Mod/Import/App/PreCompiled.h
index 6dadab742e..d6dfa3ba15 100644
--- a/src/Mod/Import/App/PreCompiled.h
+++ b/src/Mod/Import/App/PreCompiled.h
@@ -41,14 +41,15 @@
 /// here get the warnings of to long specifieres disabled (needet for VC6)
 #ifdef _MSC_VER
 # pragma warning( disable : 4251 )
+# pragma warning( disable : 4275 )
 # pragma warning( disable : 4503 )
 # pragma warning( disable : 4786 )  // specifier longer then 255 chars
 #endif
 
 
 #ifdef _PreComp_
-
-// Python
+
+// Python
 #include <Python.h>
 
 // standard