diff --git a/webshell/public/MANIFEST b/webshell/public/MANIFEST
index 138e612c9f5..acd85d878fd 100644
--- a/webshell/public/MANIFEST
+++ b/webshell/public/MANIFEST
@@ -5,3 +5,5 @@
 nsIDocumentLoader.h
 nsILinkHandler.h
 nsweb.h
+nsIWebShell.h
+nsIContentViewerContainer.h