diff --git a/weaviate/backup/backup.py b/weaviate/backup/backup.py
index e349900b4..2534d6a0f 100644
--- a/weaviate/backup/backup.py
+++ b/weaviate/backup/backup.py
@@ -84,6 +84,7 @@ class BackupStatusReturn(BaseModel):
     status: BackupStatus
     path: str
     backup_id: str = Field(alias="id")
+    size: float = Field(default=0)
 
 
 class BackupReturn(BackupStatusReturn):