diff --git a/dynamorm/model.py b/dynamorm/model.py
index 11b582e..a26c697 100644
--- a/dynamorm/model.py
+++ b/dynamorm/model.py
@@ -389,7 +389,7 @@ def scan(cls, *args, **kwargs):
         * ``>``: ``Thing.scan(count__gt=10)``
         * ``>=``: ``Thing.scan(count__gte=10)``
         * ``BETWEEN``: ``Thing.scan(count__between=[10, 20])``
-        * ``IN``: ``Thing.scan(count__in=[11, 12, 13])``
+        * ``IN``: ``Thing.scan(count__is_in=[11, 12, 13])``
         * ``attribute_exists``: ``Thing.scan(foo__exists=True)``
         * ``attribute_not_exists``: ``Thing.scan(foo__not_exists=True)``
         * ``attribute_type``: ``Thing.scan(foo__type='S')``