diff --git a/src/TrackPanel.cpp b/src/TrackPanel.cpp
index b806cc54b..e0c78c589 100644
--- a/src/TrackPanel.cpp
+++ b/src/TrackPanel.cpp
@@ -164,7 +164,6 @@ is time to refresh some aspect of the screen.
 #include "AllThemeResources.h"
 #include "AudioIO.h"
 #include "float_cast.h"
-#include "MixerBoard.h"
 
 #include "Prefs.h"
 #include "RefreshCode.h"
@@ -821,13 +820,6 @@ void TrackPanel::HandleCursorForLastMouseEvent()
    HandleCursor(mLastMouseEvent);
 }
 
-MixerBoard* TrackPanel::GetMixerBoard()
-{
-   AudacityProject *p = GetProject();
-   wxASSERT(p);
-   return p->GetMixerBoard();
-}
-
 bool TrackPanel::IsAudioActive()
 {
    AudacityProject *p = GetProject();
diff --git a/src/TrackPanel.h b/src/TrackPanel.h
index 710574e0c..88cb9c392 100644
--- a/src/TrackPanel.h
+++ b/src/TrackPanel.h
@@ -333,8 +333,6 @@ class AUDACITY_DLL_API TrackPanel final : public OverlayPanel {
    virtual double GetScreenEndTime() const;
 
  protected:
-   virtual MixerBoard* GetMixerBoard();
-
    virtual bool IsAudioActive();
    virtual void HandleTrackSpecificMouseEvent(wxMouseEvent & event);