fix typo, set default
diff --git a/scripts/single-node-pod.sh b/scripts/single-node-pod.sh
index 78eca1b..147af71 100755
--- a/scripts/single-node-pod.sh
+++ b/scripts/single-node-pod.sh
@@ -49,7 +49,7 @@
     # Run the playbook, but check to see if we're on cloudlab
     if [[ -x /usr/testbed/bin/mkextrafs ]]
     then
-      ansible-playbook -i $INVENTORY cord-single-playbook.yml --extra-vars="on-clouldlab=true"
+      ansible-playbook -i $INVENTORY cord-single-playbook.yml --extra-vars="on_cloudlab=True"
     else
       ansible-playbook -i $INVENTORY cord-single-playbook.yml
     fi