diff --git a/lib/Makefile b/lib/Makefile
index 8295cbd655e9..c4b0f8c38f5d 100644
--- a/lib/Makefile
+++ b/lib/Makefile
@@ -31,7 +31,7 @@ ifdef MOZ_MAIL_NEWS
 DIRS	+= libmsg
 else
 ifdef MOZ_MAIL_COMPOSE
-DIRS	+= libmailto
+DIRS	+= mailto
 endif
 endif