diff --git a/packages/backend/src/core/activitypub/models/ApImageService.ts b/packages/backend/src/core/activitypub/models/ApImageService.ts
index 7a16972ea4..782ee002ca 100644
--- a/packages/backend/src/core/activitypub/models/ApImageService.ts
+++ b/packages/backend/src/core/activitypub/models/ApImageService.ts
@@ -86,7 +86,7 @@ export class ApImageService {
 			uri: image.url,
 			sensitive: !!(image.sensitive),
 			isLink: !shouldBeCached,
-			comment: truncate(image.name ?? undefined, this.config.maxRemoteAltTextLength),
+			comment: truncate(image.name || image.summary || undefined, this.config.maxRemoteAltTextLength),
 		});
 		if (!file.isLink || file.url === image.url) return file;