diff --git a/aman/sys/aco/Ant.py b/aman/sys/aco/Ant.py
index ca5777f..8dcdf6d 100644
--- a/aman/sys/aco/Ant.py
+++ b/aman/sys/aco/Ant.py
@@ -26,7 +26,7 @@ class Ant:
 
     # Implements function (5)
     def heuristicInformation(self, current : int):
-        _, eta, _ = self.RunwayManager.selectArrivalRunway(self.Nodes[current], self.Configuration.EarliestArrivalTime)
+        _, _, _, eta, _ = self.RunwayManager.selectArrivalRunway(self.Nodes[current], self.Configuration.EarliestArrivalTime)
         if None == eta:
             return -1.0