diff --git a/kv/union_store.go b/kv/union_store.go
index 27a34923d5..3fb233b755 100644
--- a/kv/union_store.go
+++ b/kv/union_store.go
@@ -189,8 +189,6 @@ func (us *unionStore) Get(k Key) ([]byte, error) {
 			}
 			return nil, ErrNotExist
 		}
-	}
-	if IsErrNotFound(err) {
 		v, err = us.BufferStore.r.Get(k)
 	}
 	if err != nil {