diff --git a/davmail.sh b/davmail.sh
index af36b8c8..5f7ee6d6 100644
--- a/davmail.sh
+++ b/davmail.sh
@@ -1,3 +1,4 @@
+#!/bin/bash
 # Ubuntu setup instructions :
 # install java :
 # sudo apt-get install sun-java6-bin