diff --git a/src/Symfony/Component/VarDumper/Caster/ReflectionCaster.php b/src/Symfony/Component/VarDumper/Caster/ReflectionCaster.php
index dd07c08a470b..e4a7f4e148aa 100644
--- a/src/Symfony/Component/VarDumper/Caster/ReflectionCaster.php
+++ b/src/Symfony/Component/VarDumper/Caster/ReflectionCaster.php
@@ -125,12 +125,12 @@ public static function castFunctionAbstract(\ReflectionFunctionAbstract $c, arra
 
         foreach ($c->getParameters() as $v) {
             $k = '$'.$v->name;
-            if ($v->isPassedByReference()) {
-                $k = '&'.$k;
-            }
             if (method_exists($v, 'isVariadic') && $v->isVariadic()) {
                 $k = '...'.$k;
             }
+            if ($v->isPassedByReference()) {
+                $k = '&'.$k;
+            }
             $a[$prefix.'parameters'][$k] = $v;
         }