diff --git a/cmd/object-handlers.go b/cmd/object-handlers.go
index 1e04c3a89..9054760ee 100644
--- a/cmd/object-handlers.go
+++ b/cmd/object-handlers.go
@@ -91,7 +91,7 @@ const (
 func setHeadGetRespHeaders(w http.ResponseWriter, reqParams url.Values) {
 	for k, v := range reqParams {
 		if header, ok := supportedHeadGetReqParams[strings.ToLower(k)]; ok {
-			w.Header()[header] = v
+			w.Header()[header] = []string{strings.Join(v, ",")}
 		}
 	}
 }