diff --git a/pandas/core/generic.py b/pandas/core/generic.py
index 946bf99e7c9ae..bc5f6b2733b99 100644
--- a/pandas/core/generic.py
+++ b/pandas/core/generic.py
@@ -6460,7 +6460,7 @@ def copy(self, deep: bool | None = True) -> Self:
         1     [3, 4]
         dtype: object
         """
-        data = self._mgr.copy(deep=deep)
+        data = self._mgr.copy(deep=deep)  # type: ignore[arg-type]
         return self._constructor_from_mgr(data, axes=data.axes).__finalize__(
             self, method="copy"
         )