diff --git a/Source/cmStandardIncludes.h b/Source/cmStandardIncludes.h
index d065f6f68..ebd2ce564 100644
--- a/Source/cmStandardIncludes.h
+++ b/Source/cmStandardIncludes.h
@@ -118,6 +118,11 @@ extern int putenv (char *__string) __THROW;
 # endif
 #endif
 
+#ifdef _MSC_VER
+typedef unsigned short mode_t;
+#endif
+
+
 #ifdef CM_HAS_STD_BUT_NOT_FOR_IOSTREAM
 // some compilers have std:: but not for the stream library,
 // so we have to bring it into the std namespace by hand.
diff --git a/Source/cmSystemTools.cxx b/Source/cmSystemTools.cxx
index 7478d71c9..dae4124f8 100644
--- a/Source/cmSystemTools.cxx
+++ b/Source/cmSystemTools.cxx
@@ -35,6 +35,7 @@
 #include <string.h>
 #include <windows.h>
 #include <direct.h>
+#include <io.h>
 #define _unlink unlink
 #else
 #include <sys/types.h>