From cd51cdd3794df1330ebd69a6fe64a93e35e4f377 Mon Sep 17 00:00:00 2001
From: Marco Gorelli <33491632+MarcoGorelli@users.noreply.github.com>
Date: Mon, 20 Jan 2025 01:30:19 +0400
Subject: [PATCH] dask fix?

---
 narwhals/_dask/namespace.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/narwhals/_dask/namespace.py b/narwhals/_dask/namespace.py
index 936b9abb9..6372fbac6 100644
--- a/narwhals/_dask/namespace.py
+++ b/narwhals/_dask/namespace.py
@@ -354,7 +354,7 @@ def func(df: DaskLazyFrame) -> list[dx.Series]:
                     init_value,
                 )
 
-            return [result]
+            return [result.rename(null_mask[0].name)]
 
         return DaskExpr(
             call=func,