diff --git a/mozilla/xpfe/components/ucth/src/Makefile.in b/mozilla/xpfe/components/ucth/src/Makefile.in
index b82d92e1b82..128d74b86cf 100644
--- a/mozilla/xpfe/components/ucth/src/Makefile.in
+++ b/mozilla/xpfe/components/ucth/src/Makefile.in
@@ -29,7 +29,7 @@ include $(DEPTH)/config/autoconf.mk
 MODULE		= mozucth
 LIBRARY_NAME	= mozucth
 IS_COMPONENT	= 1
-REQUIRES	= xpcom appshell dom js necko widget layout intl locale exthandler
+REQUIRES	= xpcom appshell dom js necko widget layout intl locale exthandler pref
 
 CPPSRCS		= nsUnknownContentTypeHandler.cpp