diff --git a/mozilla/xpcom/io/nsFileSpecWin.cpp b/mozilla/xpcom/io/nsFileSpecWin.cpp
index dea1904aeec..23fe99f6898 100644
--- a/mozilla/xpcom/io/nsFileSpecWin.cpp
+++ b/mozilla/xpcom/io/nsFileSpecWin.cpp
@@ -33,6 +33,7 @@
 #include "windows.h"
 
 #if (_MSC_VER == 1100)
+#define INITGUID
 #include "objbase.h"
 DEFINE_OLEGUID(IID_IPersistFile, 0x0000010BL, 0, 0);
 #endif
diff --git a/mozilla/xpcom/io/nsLocalFileWin.h b/mozilla/xpcom/io/nsLocalFileWin.h
index 47e134391ce..d0830e5f2cf 100644
--- a/mozilla/xpcom/io/nsLocalFileWin.h
+++ b/mozilla/xpcom/io/nsLocalFileWin.h
@@ -38,7 +38,6 @@
 
 // For older version (<6.0) of the VC Compiler
 #if (_MSC_VER == 1100)
-#define INITGUID
 #include "objbase.h"
 DEFINE_OLEGUID(IID_IPersistFile, 0x0000010BL, 0, 0);
 #endif