diff --git a/core/src/services/cos/backend.rs b/core/src/services/cos/backend.rs
index f1fc43403833..6c6e696a9838 100644
--- a/core/src/services/cos/backend.rs
+++ b/core/src/services/cos/backend.rs
@@ -314,7 +314,7 @@ impl Access for CosBackend {
 
         match status {
             StatusCode::OK => {
-                let header = resp.headers();
+                let headers = resp.headers();
                 let meta = parse_into_metadata(path, headers)?;
                 let user_meta = parse_prefixed_headers(headers, "x-cos-meta-");
                 if !user_meta.is_empty() {