diff --git a/Makefile.in b/Makefile.in
index 31513cfcd15b..af126fd7362e 100644
--- a/Makefile.in
+++ b/Makefile.in
@@ -184,6 +184,10 @@ ifdef MOZ_XMLEXTRAS
 tier_9_dirs += extensions/xmlextras
 endif
 
+ifdef MOZ_UNIVERSALCHARDET
+tier_9_dirs += extensions/universalchardet
+endif
+
 ifdef MOZ_OJI
 tier_9_dirs	+= \
 		js/src/liveconnect \