diff --git a/library/Businessprocess/BpNode.php b/library/Businessprocess/BpNode.php
index 1a8d91e..7776f34 100644
--- a/library/Businessprocess/BpNode.php
+++ b/library/Businessprocess/BpNode.php
@@ -242,7 +242,7 @@ class BpNode extends Node
 
     public function hasInfoUrl()
     {
-        return $this->url !== null;
+        return ! empty($this->url);
     }
 
     public function getInfoUrl()