diff --git a/cdmtaskservice/s3/client.py b/cdmtaskservice/s3/client.py
index 5c76d33..5a0f0f6 100644
--- a/cdmtaskservice/s3/client.py
+++ b/cdmtaskservice/s3/client.py
@@ -476,6 +476,7 @@ async def _upload(self, client, buk: str, key: str, loc: Path, crc64nvme: str):
                     Bucket=buk,
                     Key=key,
                     Body=f,
+                    ChecksumAlgorithm="CRC64NVME",
                     ChecksumCRC64NVME=crc64nvme
                 )
             return