diff --git a/core/src/net/sf/openrocket/simulation/GroundStepper.java b/core/src/net/sf/openrocket/simulation/GroundStepper.java
index 49c8b5b4f..b13cfde8c 100644
--- a/core/src/net/sf/openrocket/simulation/GroundStepper.java
+++ b/core/src/net/sf/openrocket/simulation/GroundStepper.java
@@ -20,5 +20,6 @@ public class GroundStepper extends AbstractSimulationStepper {
 	@Override
 	public void step(SimulationStatus status, double timeStep) throws SimulationException {
 		log.trace("step:  position=" + status.getRocketPosition() + ", velocity=" + status.getRocketVelocity());
+		status.setSimulationTime(status.getSimulationTime() + timeStep);
 	}
 }