diff --git a/aleksis/apps/alsijil/frontend/components/Coursebook.vue b/aleksis/apps/alsijil/frontend/components/Coursebook.vue
index 1723f10ceb9515cf9c3458604c41fd965a537e99..c0d05a5d49cb6cbefbfe6bfc66b3f9e2155553ed 100644
--- a/aleksis/apps/alsijil/frontend/components/Coursebook.vue
+++ b/aleksis/apps/alsijil/frontend/components/Coursebook.vue
@@ -76,6 +76,9 @@ export default {
     return {
       gqlQuery: documentationsForCoursebook,
       lastQuery: null,
+      // Placeholder values while query isn't completed yet
+      groups: [],
+      courses: [],
     };
   },
   apollo: {