diff --git a/src/gcp/client.rs b/src/gcp/client.rs
index 1cc72964..9a54dd7d 100644
--- a/src/gcp/client.rs
+++ b/src/gcp/client.rs
@@ -514,13 +514,11 @@ impl GoogleCloudStorageClient {
         completed_parts: Vec<PartId>,
     ) -> Result<PutResult> {
         if completed_parts.is_empty() {
-            // GCS doesn't allow empty multipart uploads
+            // GCS doesn't allow empty multipart uploads, so fallback to regular upload.
+            self.multipart_cleanup(path, multipart_id).await?;
             let result = self
-                .request(Method::PUT, path)
-                .idempotent(true)
-                .do_put()
+                .put(path, PutPayload::new(), Default::default())
                 .await?;
-            self.multipart_cleanup(path, multipart_id).await?;
             return Ok(result);
         }