diff --git a/library/Businessprocess/Node.php b/library/Businessprocess/Node.php
index 199cbb9..4133b1c 100644
--- a/library/Businessprocess/Node.php
+++ b/library/Businessprocess/Node.php
@@ -112,7 +112,7 @@ abstract class Node
         return $this;
     }
 
-    public function hasProblems()
+    public function isProblem()
     {
         return $this->getState() > 0;
     }