diff --git a/dom/ipc/TabParent.h b/dom/ipc/TabParent.h
index 10d4237b39..d6e24dc89a 100644
--- a/dom/ipc/TabParent.h
+++ b/dom/ipc/TabParent.h
@@ -22,6 +22,7 @@
 #include "Units.h"
 #include "WritingModes.h"
 #include "js/TypeDecls.h"
+#include "TabMessageUtils.h"
 
 class nsFrameLoader;
 class nsIFrameLoader;