diff --git a/src/Localization.php b/src/Localization.php
index a5a05ce..22925b5 100644
--- a/src/Localization.php
+++ b/src/Localization.php
@@ -307,7 +307,7 @@ public function getNonLocalizedURL($url = null)
      */
     public function getLocalizedURL($locale = null, $url = null, $attributes = [])
     {
-        if ($locale === null) {
+        if (is_null($locale)) {
             $locale = $this->getCurrentLocale();
         }