diff --git a/pandas/core/frame.py b/pandas/core/frame.py
index ccc6949e6f2e0..1ecf5f4ee29dd 100644
--- a/pandas/core/frame.py
+++ b/pandas/core/frame.py
@@ -8285,8 +8285,7 @@ def groupby(
                Also accept list of columns names.
 
         index : str or object or a list of str, optional
-            Column to use to make new frame's index. If None, uses
-            existing index.
+            Column to use to make new frame's index. If not given, uses existing index.
 
             .. versionchanged:: 1.1.0
                Also accept list of index names.