diff --git a/mozilla/xpinstall/stub/xpistub.cpp b/mozilla/xpinstall/stub/xpistub.cpp
index 971a2be4fae..d23a561c643 100644
--- a/mozilla/xpinstall/stub/xpistub.cpp
+++ b/mozilla/xpinstall/stub/xpistub.cpp
@@ -43,8 +43,10 @@
 #include "plstr.h"
 
 #ifdef XP_PC
+#if !defined(XP_OS2)
 #include <windows.h>
 #include <direct.h>
+#endif
 #define COMPONENT_REG "component.reg"
 #endif