diff --git a/aleksis/apps/alsijil/frontend/components/coursebook/Coursebook.vue b/aleksis/apps/alsijil/frontend/components/coursebook/Coursebook.vue
index 008014734583bd84c9e854e74d67d657dc22aa44..87d9f429075cad7a46a80dd55a82e3d01ea642c2 100644
--- a/aleksis/apps/alsijil/frontend/components/coursebook/Coursebook.vue
+++ b/aleksis/apps/alsijil/frontend/components/coursebook/Coursebook.vue
@@ -56,7 +56,7 @@
           :subjects="subjects"
           :documentation="item"
           :affected-query="lastQuery"
-          :value="(selectedParticipations[item.id] ??= [])"
+          :value="selectedParticipations[item.id] ??= []"
           @input="selectParticipation(item.id, $event)"
         />
       </template>