diff --git a/admin/asterisk11-gui/files/agui-postinst b/admin/asterisk11-gui/files/agui-postinst
index d9addb3..ded9d5f 100755
--- a/admin/asterisk11-gui/files/agui-postinst
+++ b/admin/asterisk11-gui/files/agui-postinst
@@ -1,4 +1,4 @@
-#!/bin/bash
+#!/bin/sh
 
 CFG_PATH="/etc/asterisk/"
 GUI_CFG_PREFIX="gui_"