diff --git a/pandas/core/resample.py b/pandas/core/resample.py
index 83626a42134d6..917382544199a 100644
--- a/pandas/core/resample.py
+++ b/pandas/core/resample.py
@@ -205,7 +205,7 @@ def __getattr__(self, attr: str):
 
     # error: Signature of "obj" incompatible with supertype "BaseGroupBy"
     @property
-    def obj(self) -> NDFrameT:  # type: ignore[override]
+    def obj(self) -> NDFrame:  # type: ignore[override]
         # error: Incompatible return value type (got "Optional[Any]",
         # expected "NDFrameT")
         return self.groupby.obj  # type: ignore[return-value]