diff --git a/playbook-template/bootstrap.sh b/playbook-template/bootstrap.sh
old mode 100644
new mode 100755
index cfe3f4717ebd198f99f91d8f38d4f90eadcdc502..c9d6be5560cf6965fb2f0774413f541392d6f9c8
--- a/playbook-template/bootstrap.sh
+++ b/playbook-template/bootstrap.sh
@@ -39,7 +39,7 @@ ansible-galaxy install -r requirements.galaxy.yml
 ansible-playbook -i inventory.yaml playbook.yml
 
 # to stay in our comfy virtualenv
-if [[ -n "$SHELL" ]]
+if [[ -z "$SHELL" ]]
 then
   SHELL="bash"
 fi