diff --git a/pandas/core/frame.py b/pandas/core/frame.py
index dd37b94b6428b..05c2348043701 100644
--- a/pandas/core/frame.py
+++ b/pandas/core/frame.py
@@ -8211,7 +8211,7 @@ def groupby(
         level: IndexLabel | None = None,
         as_index: bool = True,
         sort: bool = True,
-        group_keys: bool | lib.NoDefault = no_default,
+        group_keys: bool = True,
         observed: bool = False,
         dropna: bool = True,
     ) -> DataFrameGroupBy:
diff --git a/pandas/core/series.py b/pandas/core/series.py
index badde08c3820d..06e9611c318cd 100644
--- a/pandas/core/series.py
+++ b/pandas/core/series.py
@@ -1969,7 +1969,7 @@ def groupby(
         level: IndexLabel = None,
         as_index: bool = True,
         sort: bool = True,
-        group_keys: bool | lib.NoDefault = no_default,
+        group_keys: bool = True,
         observed: bool = False,
         dropna: bool = True,
     ) -> SeriesGroupBy: