diff --git a/widget/public/Makefile.in b/widget/public/Makefile.in
index 5bc82f4dda9b..5e0cd14601fd 100644
--- a/widget/public/Makefile.in
+++ b/widget/public/Makefile.in
@@ -77,6 +77,7 @@ EXPORTS = \
 	nsIFontNameIterator.h \
 	nsIFontSizeIterator.h \
 	nsIFontRetrieverService.h \
+	nsIContextMenu.h \
 	$(NULL)
 
 EXPORTS := $(addprefix $(srcdir)/, $(EXPORTS))