diff --git a/git-submodule.sh b/git-submodule.sh
index 7eb1de03a5..444e1c581a 100755
--- a/git-submodule.sh
+++ b/git-submodule.sh
@@ -617,7 +617,7 @@ cmd_summary() {
 	if [ -n "$files" ]
 	then
 		test -n "$cached" &&
-		die "--cached cannot be used with --files"
+		die "$(gettext -- "--cached cannot be used with --files")"
 		diff_cmd=diff-files
 		head=
 	fi