diff --git a/src/Provider/Node/SystemNodeProvider.php b/src/Provider/Node/SystemNodeProvider.php
index 168d79c..9e04d89 100644
--- a/src/Provider/Node/SystemNodeProvider.php
+++ b/src/Provider/Node/SystemNodeProvider.php
@@ -9,11 +9,11 @@ class SystemNodeProvider implements NodeProviderInterface
     public function getNode()
     {
         static $node = null;
-        
-        if($node !== null) {
+
+        if ($node !== null) {
             return $node;
-        }        
-        
+        }
+
         $pattern = '/[^:]([0-9A-Fa-f]{2}([:-])[0-9A-Fa-f]{2}(\2[0-9A-Fa-f]{2}){4})[^:]/';
         $matches = array();