diff --git a/awscrt/s3.py b/awscrt/s3.py
index 47c8cb16d..d5cf6fcbd 100644
--- a/awscrt/s3.py
+++ b/awscrt/s3.py
@@ -205,7 +205,7 @@ class S3Client(NativeResource):
             Default values scale with target throughput and are currently
             between 2GiB and 8GiB (may change in future)
 
-        network_interface_names: (Optional[Sequence(str)]) 
+        network_interface_names: (Optional[Sequence(str)])
             **THIS IS AN EXPERIMENTAL AND UNSTABLE API.**
             A sequence of network interface names. The client will distribute the
             connections across network interfaces. If any interface name is invalid, goes down,