diff --git a/netwerk/base/public/MANIFEST_IDL b/netwerk/base/public/MANIFEST_IDL
index 070a333e958d..88011d579963 100644
--- a/netwerk/base/public/MANIFEST_IDL
+++ b/netwerk/base/public/MANIFEST_IDL
@@ -11,3 +11,7 @@ nsIRequest.idl
 nsISocketTransportService.idl
 nsIFileTransportService.idl
 nsIFileSystem.idl
+nsIContentHandler.idl
+nsIURIDispatcher.idl
+nsIURIContentListener.idl
+