diff --git a/bin/kerl.setup.bash b/bin/kerl.setup.bash
index 417feca..752182d 100644
--- a/bin/kerl.setup.bash
+++ b/bin/kerl.setup.bash
@@ -1 +1,2 @@
-test -s "$HOME/.kerl/installs/21.0/activate" && source "$HOME/.kerl/installs/21.0/activate"
+#!/bin/bash
+test -s "$HOME/.kerl/installs/21.0/activate" && . "$HOME/.kerl/installs/21.0/activate"