diff --git a/build.sh b/build.sh
index 90d0a6153b8..f21488ece3c 100755
--- a/build.sh
+++ b/build.sh
@@ -1,3 +1,4 @@
+#!/bin/bash
 #-------------------------------------------------------------------------------------------------------
 # Copyright (C) Microsoft. All rights reserved.
 # Licensed under the MIT license. See LICENSE.txt file in the project root for full license information.