diff --git a/functions-common b/functions-common
index 24507fe..cbfa130 100644
--- a/functions-common
+++ b/functions-common
@@ -1,3 +1,5 @@
+#!/bin/bash
+#
 # functions-common - Common functions used by DevStack components
 #
 # The canonical copy of this file is maintained in the DevStack repo.