diff --git a/request.go b/request.go
index 7ed964d3..cbe19d34 100644
--- a/request.go
+++ b/request.go
@@ -128,15 +128,7 @@ func (r *Request) SetHeaders(headers map[string]string) *Request {
 // Also you can override header value, which was set at client instance level.
 func (r *Request) SetMultiValueHeaders(headers map[string][]string) *Request {
 	for key, values := range headers {
-		var headerValue string
-
-		if len(values) > 1 {
-			headerValue = strings.Join(values, ", ")
-		} else {
-			headerValue = values[0]
-		}
-
-		r.SetHeader(key, headerValue)
+		r.SetHeader(key, strings.Join(values, ", "))
 	}
 	return r
 }
diff --git a/request_test.go b/request_test.go
index ff557aa9..01b8c527 100644
--- a/request_test.go
+++ b/request_test.go
@@ -1381,6 +1381,7 @@ func TestSetHeaderMultipleValue(t *testing.T) {
 			"Authorization": []string{"Bearer xyz"},
 		})
 	assertEqual(t, "text/*, text/html, *", r.Header.Get("content"))
+	assertEqual(t, "Bearer xyz", r.Header.Get("authorization"))
 }
 
 func TestOutputFileWithBaseDirAndRelativePath(t *testing.T) {