diff --git a/server/src/dtos/asset-response.dto.ts b/server/src/dtos/asset-response.dto.ts
index 0658567912..9a963e1e98 100644
--- a/server/src/dtos/asset-response.dto.ts
+++ b/server/src/dtos/asset-response.dto.ts
@@ -118,7 +118,7 @@ export function mapAsset(entity: AssetEntity, options: AssetMapOptions = {}): As
       id: entity.id,
       type: entity.type,
       originalMimeType: mimeTypes.lookup(entity.originalFileName),
-      thumbhash: entity.thumbhash?.toString('base64') ?? null,
+      thumbhash: entity.thumbhash ? hexOrBufferToBase64(entity.thumbhash) : null,
       localDateTime: entity.localDateTime,
       duration: entity.duration ?? '0:00:00.00000',
       livePhotoVideoId: entity.livePhotoVideoId,