diff --git a/src/Framework/Container/PimpleContainer.php b/src/Framework/Container/PimpleContainer.php
index 561d6f9..35b94be 100644
--- a/src/Framework/Container/PimpleContainer.php
+++ b/src/Framework/Container/PimpleContainer.php
@@ -24,7 +24,7 @@ public function __construct(Container $container)
      */
     public function get($id)
     {
-        if (!isset($this->container[$id])) {
+        if (!$this->has($id)) {
             throw new NotFoundException(sprintf('Identifier "%s" is not defined in container.', $id));
         }
         return $this->container[$id];
@@ -38,4 +38,4 @@ public function has($id)
     {
         return isset($this->container[$id]);
     }
-}
\ No newline at end of file
+}