diff --git a/config.sub b/config.sub
index f3a0f40..667d3d2 100755
--- a/config.sub
+++ b/config.sub
@@ -1,4 +1,4 @@
-#!/bin/sh
+#! /bin/sh
 # Configuration validation subroutine script, version 1.1.
 #   Copyright (C) 1991, 1992, 1993, 1994, 1995 Free Software Foundation, Inc.
 # This file is (in principle) common to ALL GNU software.