diff --git a/bin/ai/regression/completeness.sh b/bin/ai/regression/completeness.sh
old mode 100644
new mode 100755
--- a/bin/ai/regression/completeness.sh
+++ b/bin/ai/regression/completeness.sh
@@ -1,5 +1,7 @@
 #!/bin/sh
 
+# $Id$
+
 if ! [ -f ai/regression/regression.nut ]; then
 	echo "Make sure you are in the root of OpenTTD before starting this script."
 	exit 1