diff --git a/pandas/core/generic.py b/pandas/core/generic.py
index 9840af15f1249..33fcc94f906d5 100644
--- a/pandas/core/generic.py
+++ b/pandas/core/generic.py
@@ -10216,6 +10216,7 @@ def shift(
         suffix : str, optional
             If str and periods is an iterable, this is added after the column
             name and before the shift value for each shifted column name.
+            For `Series` this parameter is unused and defaults to `None`.
 
         Returns
         -------