diff --git a/src/Provider/Node/SystemNodeProvider.php b/src/Provider/Node/SystemNodeProvider.php
index 140ff3b..168d79c 100644
--- a/src/Provider/Node/SystemNodeProvider.php
+++ b/src/Provider/Node/SystemNodeProvider.php
@@ -8,7 +8,12 @@ class SystemNodeProvider implements NodeProviderInterface
 {
     public function getNode()
     {
-        $node = null;
+        static $node = null;
+        
+        if($node !== null) {
+            return $node;
+        }        
+        
         $pattern = '/[^:]([0-9A-Fa-f]{2}([:-])[0-9A-Fa-f]{2}(\2[0-9A-Fa-f]{2}){4})[^:]/';
         $matches = array();