diff --git a/jsprit-core/src/main/java/com/graphhopper/jsprit/core/algorithm/termination/VariationCoefficientTermination.java b/jsprit-core/src/main/java/com/graphhopper/jsprit/core/algorithm/termination/VariationCoefficientTermination.java
index 5f177c3d..d960cf6d 100644
--- a/jsprit-core/src/main/java/com/graphhopper/jsprit/core/algorithm/termination/VariationCoefficientTermination.java
+++ b/jsprit-core/src/main/java/com/graphhopper/jsprit/core/algorithm/termination/VariationCoefficientTermination.java
@@ -52,7 +52,7 @@ public class VariationCoefficientTermination implements PrematureAlgorithmTermin
 
     private final int noIterations;
 
-    private final double variationCoefficientThreshold;
+    protected double variationCoefficientThreshold;
 
     private int currentIteration;