diff --git a/jsprit-core/src/main/java/jsprit/core/algorithm/recreate/CalculatorBuilder.java b/jsprit-core/src/main/java/jsprit/core/algorithm/recreate/CalculatorBuilder.java
index be2fcfde..c87c2834 100644
--- a/jsprit-core/src/main/java/jsprit/core/algorithm/recreate/CalculatorBuilder.java
+++ b/jsprit-core/src/main/java/jsprit/core/algorithm/recreate/CalculatorBuilder.java
@@ -83,7 +83,7 @@ class CalculatorBuilder {
 
 	private VehicleFleetManager fleetManager;
 
-	private boolean timeScheduling;
+	private boolean timeScheduling = false;
 
 	private double timeSlice;