diff --git a/pandas/core/frame.py b/pandas/core/frame.py
index 6158e19737185..16a45322a556f 100644
--- a/pandas/core/frame.py
+++ b/pandas/core/frame.py
@@ -9854,7 +9854,7 @@ def unstack(
         ----------
         level : int, str, or list of these, default -1 (last level)
             Level(s) of index to unstack, can pass level name.
-        fill_value : int, str or dict
+        fill_value : scalar
             Replace NaN with this value if the unstack produces missing values.
         sort : bool, default True
             Sort the level(s) in the resulting MultiIndex columns.