diff --git a/mozilla/modules/plugin/base/public/nsplugindefs.h b/mozilla/modules/plugin/base/public/nsplugindefs.h
index c3b1f1bcc70..e96c0fd9278 100644
--- a/mozilla/modules/plugin/base/public/nsplugindefs.h
+++ b/mozilla/modules/plugin/base/public/nsplugindefs.h
@@ -54,10 +54,10 @@
 #define nsplugindefs_h___
 
 #if defined(XP_OS2) || defined(__OS2__)
-#pragma pack(1)
 #define INCL_BASE
 #define INCL_PM
 #include <os2.h>
+#pragma pack(1)
 #endif
 
 #ifndef prtypes_h___