diff --git a/src/core/model/realtime-simulator-impl.cc b/src/core/model/realtime-simulator-impl.cc
index 9c4152dc6..bfad0adc3 100644
--- a/src/core/model/realtime-simulator-impl.cc
+++ b/src/core/model/realtime-simulator-impl.cc
@@ -456,7 +456,7 @@ RealtimeSimulatorImpl::Run()
         if (!process)
         {
             // Sleep until signalled
-            tsNow = m_synchronizer->Synchronize(tsNow, tsDelay);
+            m_synchronizer->Synchronize(tsNow, tsDelay);
 
             // Re-check event queue
             continue;