diff --git a/Algorithm/PathFinding/JumpPointSearch.php b/Algorithm/PathFinding/JumpPointSearch.php
index 67a99cbae..0b7cdc28c 100644
--- a/Algorithm/PathFinding/JumpPointSearch.php
+++ b/Algorithm/PathFinding/JumpPointSearch.php
@@ -41,7 +41,7 @@ class JumpPointSearch implements PathFinderInterface
         $startNode->setF(0.0);
         $startNode->setOpened(true);
 
-        $openList = new Heap(function($node1, $node2) { return $node1->getF() - $nodeB->getF(); });
+        $openList = new Heap(function($node1, $node2) { return $node1->getF() - $node2->getF(); });
         $openList->push($startNode);
         $node = null;