diff --git a/src/Project.cpp b/src/Project.cpp
index 2c028623a..f14c29839 100644
--- a/src/Project.cpp
+++ b/src/Project.cpp
@@ -4623,6 +4623,11 @@ void AudacityProject::TP_RedrawScrollbars()
    FixScrollbars();
 }
 
+void AudacityProject::TP_HandleResize()
+{
+   HandleResize();
+}
+
 void AudacityProject::GetPlayRegion(double* playRegionStart,
                                     double *playRegionEnd)
 {
diff --git a/src/Project.h b/src/Project.h
index 07eae659a..144d5975f 100644
--- a/src/Project.h
+++ b/src/Project.h
@@ -406,6 +406,7 @@ class AUDACITY_DLL_API AudacityProject:  public wxFrame,
    virtual void TP_ScrollRight();
    virtual void TP_ScrollWindow(double scrollto);
    virtual void TP_ScrollUpDown(int delta);
+   virtual void TP_HandleResize();
 
    // ToolBar
 
diff --git a/src/TrackPanelListener.h b/src/TrackPanelListener.h
index 4d5b2babe..fd147d720 100644
--- a/src/TrackPanelListener.h
+++ b/src/TrackPanelListener.h
@@ -34,6 +34,7 @@ class AUDACITY_DLL_API TrackPanelListener {
    virtual void TP_ScrollRight() = 0;
    virtual void TP_ScrollWindow(double scrollto) = 0;
    virtual void TP_ScrollUpDown(int delta) = 0;
+   virtual void TP_HandleResize() = 0;
 };
 
 #endif