another when condition syntax error

playbooks/roles/ora/tasks/deploy.yml

@@ -104,7 +104,7 @@
   shell:  "{{ supervisor_ctl }} -c {{ supervisor_cfg }} update"
   register: supervisor_update
   when: not disable_edx_services
-  changed_when: supervisor_update.stdout is defined supervisor_update.stdout != ""
+  changed_when: supervisor_update.stdout is defined and supervisor_update.stdout != ""
 
 - name: ensure ora is started
   supervisorctl_local: >