diff --git a/object_store/src/aws/client.rs b/object_store/src/aws/client.rs
index 88258ac998dc..b6d6b62a16db 100644
--- a/object_store/src/aws/client.rs
+++ b/object_store/src/aws/client.rs
@@ -62,6 +62,7 @@ use std::sync::Arc;
 const VERSION_HEADER: &str = "x-amz-version-id";
 const SHA256_CHECKSUM: &str = "x-amz-checksum-sha256";
 const USER_DEFINED_METADATA_HEADER_PREFIX: &str = "x-amz-meta-";
+const ALGORITHM: &str = "x-amz-checksum-algorithm";
 
 /// A specialized `Error` for object store-related errors
 #[derive(Debug, Snafu)]
@@ -390,10 +391,9 @@ impl<'a> Request<'a> {
             let payload_sha256 = sha256.finish();
 
             if let Some(Checksum::SHA256) = self.config.checksum {
-                self.builder = self.builder.header(
-                    "x-amz-checksum-sha256",
-                    BASE64_STANDARD.encode(payload_sha256),
-                );
+                self.builder = self
+                    .builder
+                    .header(SHA256_CHECKSUM, BASE64_STANDARD.encode(payload_sha256));
             }
             self.payload_sha256 = Some(payload_sha256);
         }
@@ -617,11 +617,11 @@ impl S3Client {
         location: &Path,
         opts: PutMultipartOpts,
     ) -> Result<MultipartId> {
-        let mut req = self.request(Method::POST, location);
-        if self.config.checksum == Some(Checksum::SHA256) {
-            req = req.header("x-amz-checksum-algorithm", "SHA256");
+        let mut reqquest = self.request(Method::POST, location);
+        if let Some(algorithm) = self.config.checksum {
+            reqquest = reqquest.header(ALGORITHM, &algorithm.to_string().to_uppercase());
         }
-        let response = req
+        let response = reqquest
             .query(&[("uploads", "")])
             .with_encryption_headers()
             .with_attributes(opts.attributes)
@@ -674,7 +674,7 @@ impl S3Client {
         let response = request.send().await?;
         let checksum = response
             .headers()
-            .get("x-amz-checksum-sha256")
+            .get(SHA256_CHECKSUM)
             .and_then(|v| v.to_str().ok())
             .map(|v| v.to_string());