diff --git a/include/wx/gtk/checkbox.h b/include/wx/gtk/checkbox.h
index a3631debaf..26db70bcba 100644
--- a/include/wx/gtk/checkbox.h
+++ b/include/wx/gtk/checkbox.h
@@ -49,7 +49,6 @@ public:
     void GTKEnableEvents();
 
 protected:
-    virtual wxSize DoGetBestSize() const;
     virtual void DoApplyWidgetStyle(GtkRcStyle *style);
     virtual GdkWindow *GTKGetWindow(wxArrayGdkWindows& windows) const;
 
diff --git a/src/gtk/checkbox.cpp b/src/gtk/checkbox.cpp
index f4d79dde3e..52d99fe569 100644
--- a/src/gtk/checkbox.cpp
+++ b/src/gtk/checkbox.cpp
@@ -239,11 +239,6 @@ GdkWindow *wxCheckBox::GTKGetWindow(wxArrayGdkWindows& WXUNUSED(windows)) const
     return GTK_BUTTON(m_widgetCheckbox)->event_window;
 }
 
-wxSize wxCheckBox::DoGetBestSize() const
-{
-    return wxControl::DoGetBestSize();
-}
-
 // static
 wxVisualAttributes
 wxCheckBox::GetClassDefaultAttributes(wxWindowVariant WXUNUSED(variant))