diff --git a/spec/schemas/_common.yaml b/spec/schemas/_common.yaml
index ce7510e20..72114f8d8 100644
--- a/spec/schemas/_common.yaml
+++ b/spec/schemas/_common.yaml
@@ -1255,7 +1255,6 @@ components:
           type: object
       required:
         - found
-        - _source
     IndexAlias:
       type: string
     ErrorResponseBase: