diff --git a/py-polars/polars/io/cloud/credential_provider.py b/py-polars/polars/io/cloud/credential_provider.py
index 1010e6c17c33..1dd79662b642 100644
--- a/py-polars/polars/io/cloud/credential_provider.py
+++ b/py-polars/polars/io/cloud/credential_provider.py
@@ -85,7 +85,7 @@ def __init__(
         ----------
         profile_name : str
             Profile name to use from credentials file.
-        assume_role : dict[AWSAssumeRoleKWArgs, Any] | None
+        assume_role : AWSAssumeRoleKWArgs | None
             Configure a role to assume. These are passed as kwarg parameters to
             [STS.client.assume_role()](https://boto3.amazonaws.com/v1/documentation/api/latest/reference/services/sts/client/assume_role.html#STS.Client.assume_role)
         """