diff --git a/server/server.go b/server/server.go
index 211eb38895..7aad0cf70e 100644
--- a/server/server.go
+++ b/server/server.go
@@ -367,9 +367,9 @@ func newServer(ctx context.Context, c Config, rotationStrategy rotationStrategy)
         // Buffer size middleware
         bufferSizeMidldleware := func(next http.Handler) http.Handler {
                 return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
-                        w := bufio.NewWriterSize(w, 4096*2)
-			if w.Buffered() > 0{
-				w.Flush()
+                        pw := bufio.NewWriterSize(w, 4096*2)
+			if pw.Buffered() > 0{
+				pw.Flush()
 			}
                         next.ServeHTTP(w, r)
                 })