diff --git a/content/html/style/src/Makefile.in b/content/html/style/src/Makefile.in
index d4d08c9d6aec..931f43533e41 100644
--- a/content/html/style/src/Makefile.in
+++ b/content/html/style/src/Makefile.in
@@ -28,7 +28,7 @@ include $(DEPTH)/config/autoconf.mk
 
 MODULE		= layout
 LIBRARY_NAME	= gkconhtmlstyle_s
-REQUIRES	= xpcom string dom widget timer caps editor locale js view necko webshell pref rdf xul htmlparser txmgr docshell uriloader unicharutil uconv
+REQUIRES	= xpcom string dom widget timer caps editor locale js view necko webshell pref rdf xul htmlparser txmgr docshell uriloader unicharutil uconv xuldoc
 
 CPPSRCS		= \
 		nsCSSAtoms.cpp \