diff --git a/packages/backend/src/core/entities/NoteEntityService.ts b/packages/backend/src/core/entities/NoteEntityService.ts
index 985245aeb1..37bca3ff31 100644
--- a/packages/backend/src/core/entities/NoteEntityService.ts
+++ b/packages/backend/src/core/entities/NoteEntityService.ts
@@ -162,8 +162,8 @@ export class NoteEntityService implements OnModuleInit {
 			packedNote.reactionAcceptance = null;
 			packedNote.reactionAndUserPairCache = undefined;
 			packedNote.reactionCount = 0;
-			packedNote.reactionEmojis = undefined;
-			packedNote.reactions = undefined;
+			packedNote.reactionEmojis = {};
+			packedNote.reactions = {};
 			packedNote.isHidden = true;
 		}
 	}