diff --git a/src/Twig/TwigExtension.php b/src/Twig/TwigExtension.php
index 58f3e36a..11db9cc7 100755
--- a/src/Twig/TwigExtension.php
+++ b/src/Twig/TwigExtension.php
@@ -78,7 +78,9 @@ public function url(string $name, $queryargs = []): string
         // this is copy of \Slim\Slim::urlFor()
         // to mix path prefix in \Slim\Slim::urlFor
 
-        return rtrim($this->pathPrefix(), '/') . $this->router->urlFor($name) . $query;
+        $prepend = $this->pathPrefix ?: '';
+
+        return rtrim($prepend, '/') . $this->router->urlFor($name) . $query;
     }
 
     /**