diff --git a/functions/main b/functions/main
index dbb402aa..9b997efa 100644
--- a/functions/main
+++ b/functions/main
@@ -1,3 +1,4 @@
+#!/bin/bash
 # Filename:      /usr/share/ngcp-ngcpcfg/functions/main
 # Purpose:       helper functions for ngcpcfg
 ################################################################################