diff --git a/aleksis/apps/chronos/frontend/components/calendar_feeds/details/LessonDetails.vue b/aleksis/apps/chronos/frontend/components/calendar_feeds/details/LessonDetails.vue
index 0dd8bc7229d3aa5cc5f8b920389f8aa80e648899..d6631cf3a0bc4248e6bcd8e95eb4b143f2051dde 100644
--- a/aleksis/apps/chronos/frontend/components/calendar_feeds/details/LessonDetails.vue
+++ b/aleksis/apps/chronos/frontend/components/calendar_feeds/details/LessonDetails.vue
@@ -250,7 +250,7 @@ export default {
     initPatchData() {
       return {
         id: this.selectedEvent.meta.id,
-        subject: this.selectedEvent.meta.subject?,
+        subject: this.selectedEvent.meta.subject,
         teachers: this.selectedEvent.meta.teachers,
         rooms: this.selectedEvent.meta.rooms,
         cancelled: this.selectedEvent.meta.cancelled,