diff --git a/lib/neutron_thirdparty/trema b/lib/neutron_thirdparty/trema
index 3e59ef2..075f013 100644
--- a/lib/neutron_thirdparty/trema
+++ b/lib/neutron_thirdparty/trema
@@ -1,3 +1,5 @@
+#!/bin/bash
+#
 # Trema Sliceable Switch
 # ----------------------