diff --git a/doc/scripts/shlint.sh b/doc/scripts/shlint.sh
index 62276a8..d66100d 100755
--- a/doc/scripts/shlint.sh
+++ b/doc/scripts/shlint.sh
@@ -47,7 +47,7 @@ _debug()
 #usage
 _usage()
 {
-	echo "Usage: shlint.sh target" 1>&2
+	echo "Usage: shlint.sh [-c] target" 1>&2
 	return 1
 }