diff --git a/pandas/core/series.py b/pandas/core/series.py
index 8c5eea02c60d8..24390b6d88378 100644
--- a/pandas/core/series.py
+++ b/pandas/core/series.py
@@ -5988,7 +5988,13 @@ def rsub(self, other, level=None, fill_value=None, axis: Axis = 0):
         )
 
     @Appender(ops.make_flex_doc("mul", "series"))
-    def mul(self, other, level=None, fill_value=None, axis: Axis = 0):
+    def mul(
+        self,
+        other,
+        level: Level | None = None,
+        fill_value: float | None = None,
+        axis: Axis = 0,
+    ):
         return self._flex_method(
             other, operator.mul, level=level, fill_value=fill_value, axis=axis
         )