diff --git a/rio_tiler/io/stac.py b/rio_tiler/io/stac.py
index 5a6d8f72..1cc28c8d 100644
--- a/rio_tiler/io/stac.py
+++ b/rio_tiler/io/stac.py
@@ -73,7 +73,7 @@ def aws_get_object(
 
         # AWS_S3_ENDPOINT and AWS_HTTPS are GDAL config options of vsis3 driver
         # https://gdal.org/user/virtual_file_systems.html#vsis3-aws-s3-files
-        endpoint_url = os.environ.get("AWS_S3_ENDPOINT", "s3.amazonaws.com")
+        endpoint_url = os.environ.get("AWS_S3_ENDPOINT", None)
         if endpoint_url:
             use_https = os.environ.get("AWS_HTTPS", "YES")
             if use_https.upper() in ["YES", "TRUE", "ON"]: