diff --git a/roles/6-generic-apps/tasks/main.yml b/roles/6-generic-apps/tasks/main.yml
index fca8899e6..1c36cb5d3 100644
--- a/roles/6-generic-apps/tasks/main.yml
+++ b/roles/6-generic-apps/tasks/main.yml
@@ -41,7 +41,7 @@
 - name: LOKOLE
   include_role:
     name: lokole
-  when: lokole_install
+  when: lokole_install is defined and lokole_install
 
 - name: MEDIAWIKI
   include_role: