diff --git a/src/Mcamara/LaravelLocalization/LaravelLocalization.php b/src/Mcamara/LaravelLocalization/LaravelLocalization.php
index 228ece5..be67090 100644
--- a/src/Mcamara/LaravelLocalization/LaravelLocalization.php
+++ b/src/Mcamara/LaravelLocalization/LaravelLocalization.php
@@ -647,7 +647,8 @@ protected function substituteAttributesInRoute($attributes, $route, $locale = nu
             elseif ($value instanceOf UrlRoutable) {
                 $value = $value->getRouteKey();
             }
-            $route = str_replace(array('{'.$key.'}', '{'.$key.'?}'), $value, $route);
+            if($value)
+                $route = str_replace(array('{'.$key.'}', '{'.$key.'?}'), $value, $route);
         }
 
         // delete empty optional arguments that are not in the $attributes array