diff --git a/uriloader/exthandler/Makefile.in b/uriloader/exthandler/Makefile.in
index 75ab95f71808..0979ac2631e5 100644
--- a/uriloader/exthandler/Makefile.in
+++ b/uriloader/exthandler/Makefile.in
@@ -33,7 +33,7 @@ endif
 
 MODULE = exthandler
 LIBRARY_NAME    = exthandler_s
-REQUIRES	= xpcom string mimetype uriloader dom necko rdf webshell helperAppDlg
+REQUIRES	= xpcom string mimetype uriloader dom necko rdf webshell helperAppDlg pref
 
 ifeq ($(MOZ_WIDGET_TOOLKIT),os2)
 OSDIR	= os2