diff --git a/pandas/core/frame.py b/pandas/core/frame.py
index b20decab26928..4cdd62b038485 100644
--- a/pandas/core/frame.py
+++ b/pandas/core/frame.py
@@ -9862,7 +9862,7 @@ def join(
             values given, the `other` DataFrame must have a MultiIndex. Can
             pass an array as the join key if it is not already contained in
             the calling DataFrame. Like an Excel VLOOKUP operation.
-        how : {'left', 'right', 'outer', 'inner'}, default 'left'
+        how : {'left', 'right', 'outer', 'inner', 'cross'}, default 'left'
             How to handle the operation of the two objects.
 
             * left: use calling frame's index (or column if on is specified)