diff --git a/src/visualizer/model/visual-simulator-impl.cc b/src/visualizer/model/visual-simulator-impl.cc
index 3c2291a18..e3fe07736 100644
--- a/src/visualizer/model/visual-simulator-impl.cc
+++ b/src/visualizer/model/visual-simulator-impl.cc
@@ -109,12 +109,6 @@ VisualSimulatorImpl::IsFinished (void) const
   return m_simulator->IsFinished ();
 }
 
-Time
-VisualSimulatorImpl::Next (void) const
-{
-  return m_simulator->Next ();
-}
-
 void
 VisualSimulatorImpl::Run (void)
 {
@@ -130,12 +124,6 @@ VisualSimulatorImpl::Run (void)
     );
 }
 
-void
-VisualSimulatorImpl::RunOneEvent (void)
-{
-  m_simulator->RunOneEvent ();
-}
-
 void 
 VisualSimulatorImpl::Stop (void)
 {
diff --git a/src/visualizer/model/visual-simulator-impl.h b/src/visualizer/model/visual-simulator-impl.h
index 59a6b243d..ac8e63c64 100644
--- a/src/visualizer/model/visual-simulator-impl.h
+++ b/src/visualizer/model/visual-simulator-impl.h
@@ -51,7 +51,6 @@ public:
 
   virtual void Destroy ();
   virtual bool IsFinished (void) const;
-  virtual Time Next (void) const;
   virtual void Stop (void);
   virtual void Stop (Time const &time);
   virtual EventId Schedule (Time const &time, EventImpl *event);
@@ -62,7 +61,6 @@ public:
   virtual void Cancel (const EventId &ev);
   virtual bool IsExpired (const EventId &ev) const;
   virtual void Run (void);
-  virtual void RunOneEvent (void);
   virtual Time Now (void) const;
   virtual Time GetDelayLeft (const EventId &id) const;
   virtual Time GetMaximumSimulationTime (void) const;