diff --git a/mozilla/xpcom/build/nsXPComInit.cpp b/mozilla/xpcom/build/nsXPComInit.cpp
index 2096c898df2..8bd25cf2e78 100644
--- a/mozilla/xpcom/build/nsXPComInit.cpp
+++ b/mozilla/xpcom/build/nsXPComInit.cpp
@@ -72,6 +72,7 @@
 
 #include "nsEventQueueService.h"
 #include "nsEventQueue.h"
+#include "nsEventQueueUtils.h"
 
 #include "nsIProxyObjectManager.h"
 #include "nsProxyEventPrivate.h"  // access to the impl of nsProxyObjectManager for the generic factory registration.