diff --git a/jsprit-core/src/main/java/com/graphhopper/jsprit/core/algorithm/recreate/DefaultScorer.java b/jsprit-core/src/main/java/com/graphhopper/jsprit/core/algorithm/recreate/DefaultScorer.java
index a269245d2..ac9ad65b3 100644
--- a/jsprit-core/src/main/java/com/graphhopper/jsprit/core/algorithm/recreate/DefaultScorer.java
+++ b/jsprit-core/src/main/java/com/graphhopper/jsprit/core/algorithm/recreate/DefaultScorer.java
@@ -74,7 +74,7 @@ private TimeWindow getLargestTimeWindow(Activity act) {
             if (timeWindow == null) timeWindow = tw;
             else if (tw.larger(timeWindow)) timeWindow = tw;
         }
-        return TimeWindow.newInstance(0, Double.MAX_VALUE);
+        return timeWindow == null ? TimeWindow.newInstance(0, Double.MAX_VALUE) : timeWindow;
     }