diff --git a/server/core/models/video/formatter/video-activity-pub-format.ts b/server/core/models/video/formatter/video-activity-pub-format.ts
index 0446b708f..efdbf0526 100644
--- a/server/core/models/video/formatter/video-activity-pub-format.ts
+++ b/server/core/models/video/formatter/video-activity-pub-format.ts
@@ -284,6 +284,7 @@ function buildTags (video: MVideoAP) {
 
 function buildIcon (video: MVideoAP): ActivityIconObject[] {
   return [ video.getMiniature(), video.getPreview() ]
+    .filter(i => !!i)
     .map(i => i.toActivityPubObject(video))
 }