diff --git a/mozilla/aclocal.m4 b/mozilla/aclocal.m4
index 251d4bf8c01..3a8bb50d836 100644
--- a/mozilla/aclocal.m4
+++ b/mozilla/aclocal.m4
@@ -3,6 +3,8 @@ dnl Local autoconf macros used with mozilla
 dnl The contents of this file are under the Public Domain.
 dnl 
 
+builtin(include, build/autoconf/glib.m4)dnl
 builtin(include, build/autoconf/gtk.m4)dnl
+builtin(include, build/autoconf/libIDL.m4)dnl
 builtin(include, build/autoconf/altoptions.m4)dnl