diff --git a/contrib/merge_updates_unix.sh b/contrib/merge_updates_unix.sh
index e936272293..66730937f3 100644
--- a/contrib/merge_updates_unix.sh
+++ b/contrib/merge_updates_unix.sh
@@ -1 +1,2 @@
+#!/bin/bash
 cat ../sql/updates/world/4.3.4/*.sql > world_update.sql