diff --git a/lemur/plugins/lemur_aws/s3.py b/lemur/plugins/lemur_aws/s3.py
index c868c7a3..0e9db182 100644
--- a/lemur/plugins/lemur_aws/s3.py
+++ b/lemur/plugins/lemur_aws/s3.py
@@ -14,7 +14,7 @@ from lemur.extensions import sentry
 
 
 @sts_client("s3", service_type="resource")
-def put(bucket_name, prefix, data, encrypt, **kwargs):
+def put(bucket_name, region, prefix, data, encrypt, **kwargs):
     """
     Use STS to write to an S3 bucket
     """