diff --git a/jsprit-core/src/main/java/com/graphhopper/jsprit/core/algorithm/VehicleRoutingAlgorithm.java b/jsprit-core/src/main/java/com/graphhopper/jsprit/core/algorithm/VehicleRoutingAlgorithm.java
index 94b45359..5267f6b6 100644
--- a/jsprit-core/src/main/java/com/graphhopper/jsprit/core/algorithm/VehicleRoutingAlgorithm.java
+++ b/jsprit-core/src/main/java/com/graphhopper/jsprit/core/algorithm/VehicleRoutingAlgorithm.java
@@ -72,7 +72,7 @@ public class VehicleRoutingAlgorithm {
         }
 
         public void incCounter() {
-            long i = counter++;
+            long i = ++counter;
             long n = nextCounter;
             if (i >= n) {
                 nextCounter = n * 2;