diff --git a/python-package/xgboost/data.py b/python-package/xgboost/data.py
index f4bd2cf3831b..6d27585d9ab5 100644
--- a/python-package/xgboost/data.py
+++ b/python-package/xgboost/data.py
@@ -807,7 +807,7 @@ def _meta_from_tuple(data, field, dtype, handle):
 
 
 def _meta_from_cudf_df(data, field: str, handle: ctypes.c_void_p) -> None:
-    if field is not None and field != "label" and len(data.columns) != 1:
+    if field != "label" and len(data.columns) != 1:
         raise ValueError("Expecting meta-info to contain a single column")
     if field == "label" and len(data.columns) > 2:
         raise ValueError("Invalid shape for label.")