diff --git a/util/gitdesc.sh b/util/gitdesc.sh
index 06f6aa8..486d7dc 100755
--- a/util/gitdesc.sh
+++ b/util/gitdesc.sh
@@ -1,4 +1,4 @@
-#?bin/sh
+#!/bin/bash
 # Peter Hyman, pete@peterhyman.com
 # December 2020