diff --git a/server/helpers/custom-validators/activitypub/video-comments.ts b/server/helpers/custom-validators/activitypub/video-comments.ts
index 7a9f7326d..051c4565a 100644
--- a/server/helpers/custom-validators/activitypub/video-comments.ts
+++ b/server/helpers/custom-validators/activitypub/video-comments.ts
@@ -9,7 +9,7 @@ function isVideoCommentCreateActivityValid (activity: any) {
 }
 
 function sanitizeAndCheckVideoCommentObject (comment: any) {
-  if (comment.type !== 'Note') return false
+  if (!comment || comment.type !== 'Note') return false
 
   normalizeComment(comment)