diff --git a/jsprit-core/src/main/java/jsprit/core/algorithm/InsertionInitialSolutionFactory.java b/jsprit-core/src/main/java/jsprit/core/algorithm/InsertionInitialSolutionFactory.java
index 072e5714..83a7a887 100644
--- a/jsprit-core/src/main/java/jsprit/core/algorithm/InsertionInitialSolutionFactory.java
+++ b/jsprit-core/src/main/java/jsprit/core/algorithm/InsertionInitialSolutionFactory.java
@@ -52,6 +52,7 @@ public final class InsertionInitialSolutionFactory implements InitialSolutionFac
 	public VehicleRoutingProblemSolution createSolution(final VehicleRoutingProblem vrp) {
 		logger.info("create initial solution.");
 		List<VehicleRoute> vehicleRoutes = new ArrayList<VehicleRoute>();
+		vehicleRoutes.addAll(vrp.getInitialVehicleRoutes());
 		insertion.insertJobs(vehicleRoutes, getUnassignedJobs(vrp));
 		VehicleRoutingProblemSolution solution = new VehicleRoutingProblemSolution(vehicleRoutes, Double.MAX_VALUE);
 		double costs = solutionCostsCalculator.getCosts(solution);