diff --git a/packages/backend/src/core/activitypub/ApInboxService.ts b/packages/backend/src/core/activitypub/ApInboxService.ts
index 7edf4133d5..8462f7d805 100644
--- a/packages/backend/src/core/activitypub/ApInboxService.ts
+++ b/packages/backend/src/core/activitypub/ApInboxService.ts
@@ -32,7 +32,7 @@ import { AbuseReportService } from '@/core/AbuseReportService.js';
 import { FederatedInstanceService } from '@/core/FederatedInstanceService.js';
 import { fromTuple } from '@/misc/from-tuple.js';
 import { IdentifiableError } from '@/misc/identifiable-error.js';
-import { getApHrefNullable, getApId, getApIds, getApType, isAccept, isActor, isAdd, isAnnounce, isApObject, isBlock, isCollection, isCollectionOrOrderedCollection, isCreate, isDelete, isFlag, isFollow, isLike, isMove, isPost, isReject, isRemove, isTombstone, isUndo, isUpdate, validActor, validPost } from './type.js';
+import { getApHrefNullable, getApId, getApIds, getApType, getNullableApId, isAccept, isActor, isAdd, isAnnounce, isApObject, isBlock, isCollection, isCollectionOrOrderedCollection, isCreate, isDelete, isFlag, isFollow, isLike, isMove, isPost, isReject, isRemove, isTombstone, isUndo, isUpdate, validActor, validPost } from './type.js';
 import { ApNoteService } from './models/ApNoteService.js';
 import { ApLoggerService } from './ApLoggerService.js';
 import { ApDbResolverService } from './ApDbResolverService.js';
@@ -429,7 +429,7 @@ export class ApInboxService {
 		if (isPost(object)) {
 			await this.createNote(resolver, actor, object, false);
 		} else {
-			return `Unknown type: ${getApType(object)}`;
+			return `skip: Unsupported type for Create: ${getApType(object)} (object ${getNullableApId(object)})`;
 		}
 	}
 
@@ -832,7 +832,7 @@ export class ApInboxService {
 			await this.apNoteService.updateNote(object, actor, resolver).catch(err => console.error(err));
 			return 'ok: Note updated';
 		} else {
-			return `skip: Unknown type: ${getApType(object)}`;
+			return `skip: Unsupported type for Update: ${getApType(object)} (object ${getNullableApId(object)})`;
 		}
 	}