diff --git a/mozilla/mailnews/compose/tests/compose/test.cpp b/mozilla/mailnews/compose/tests/compose/test.cpp
index baee88f09a7..09353c778dc 100644
--- a/mozilla/mailnews/compose/tests/compose/test.cpp
+++ b/mozilla/mailnews/compose/tests/compose/test.cpp
@@ -8,6 +8,8 @@
 #include <windows.h>
 #endif
 
+#include "nsCOMPtr.h"
+
 #include "nsIComponentManager.h" 
 #include "nsMsgCompCID.h"
 #include "nsIMsgCompose.h"