diff --git a/include/wx/aui/tabmdi.h b/include/wx/aui/tabmdi.h
index bcbb2f5cad..842e9dd805 100644
--- a/include/wx/aui/tabmdi.h
+++ b/include/wx/aui/tabmdi.h
@@ -162,8 +162,6 @@ public:
 
 protected:
     void Init();
-    virtual void DoSetSize(int x, int y, int width, int height, int sizeFlags) wxOVERRIDE;
-    virtual void DoMoveWindow(int x, int y, int width, int height) wxOVERRIDE;
 
 public:
     // This function needs to be called when a size change is confirmed,
@@ -174,8 +172,6 @@ public:
 
 protected:
     wxAuiMDIParentFrame* m_pMDIParentFrame;
-    wxRect m_mdiNewRect;
-    wxRect m_mdiCurRect;
     wxIcon m_icon;
     wxIconBundle m_iconBundle;
     bool m_activateOnCreate;
@@ -218,7 +214,6 @@ protected:
     void PageChanged(int oldSelection, int newSelection);
     void OnPageClose(wxAuiNotebookEvent& evt);
     void OnPageChanged(wxAuiNotebookEvent& evt);
-    void OnSize(wxSizeEvent& evt);
 
 private:
     wxDECLARE_DYNAMIC_CLASS(wxAuiMDIClientWindow);
diff --git a/src/aui/auibook.cpp b/src/aui/auibook.cpp
index d7f5d5e57b..f01a58c46b 100644
--- a/src/aui/auibook.cpp
+++ b/src/aui/auibook.cpp
@@ -1595,14 +1595,6 @@ public:
             }
             // TODO: else if (GetFlags() & wxAUI_NB_LEFT){}
             // TODO: else if (GetFlags() & wxAUI_NB_RIGHT){}
-
-#if wxUSE_MDI
-            if (wxDynamicCast(page.window, wxAuiMDIChildFrame))
-            {
-                wxAuiMDIChildFrame* wnd = (wxAuiMDIChildFrame*)page.window;
-                wnd->ApplyMDIChildFrameRect();
-            }
-#endif
         }
     }
 
diff --git a/src/aui/tabmdi.cpp b/src/aui/tabmdi.cpp
index 7d416987b9..30a781cbc8 100644
--- a/src/aui/tabmdi.cpp
+++ b/src/aui/tabmdi.cpp
@@ -722,32 +722,6 @@ void wxAuiMDIChildFrame::DoShow(bool show)
     wxWindow::Show(show);
 }
 
-void wxAuiMDIChildFrame::DoSetSize(int x, int y, int width, int height, int sizeFlags)
-{
-    m_mdiNewRect = wxRect(x, y, width, height);
-#ifdef __WXGTK__
-    wxWindow::DoSetSize(x,y,width, height, sizeFlags);
-#else
-    wxUnusedVar(sizeFlags);
-#endif
-}
-
-void wxAuiMDIChildFrame::DoMoveWindow(int x, int y, int width, int height)
-{
-    m_mdiNewRect = wxRect(x, y, width, height);
-}
-
-void wxAuiMDIChildFrame::ApplyMDIChildFrameRect()
-{
-    if (m_mdiCurRect != m_mdiNewRect)
-    {
-        wxWindow::DoMoveWindow(m_mdiNewRect.x, m_mdiNewRect.y,
-                              m_mdiNewRect.width, m_mdiNewRect.height);
-        m_mdiCurRect = m_mdiNewRect;
-    }
-}
-
-
 //-----------------------------------------------------------------------------
 // wxAuiMDIClientWindow
 //-----------------------------------------------------------------------------
@@ -757,7 +731,6 @@ wxIMPLEMENT_DYNAMIC_CLASS(wxAuiMDIClientWindow, wxAuiNotebook);
 wxBEGIN_EVENT_TABLE(wxAuiMDIClientWindow, wxAuiNotebook)
     EVT_AUINOTEBOOK_PAGE_CHANGED(wxID_ANY, wxAuiMDIClientWindow::OnPageChanged)
     EVT_AUINOTEBOOK_PAGE_CLOSE(wxID_ANY, wxAuiMDIClientWindow::OnPageClose)
-    EVT_SIZE(wxAuiMDIClientWindow::OnSize)
 wxEND_EVENT_TABLE()
 
 wxAuiMDIClientWindow::wxAuiMDIClientWindow()
@@ -874,13 +847,5 @@ void wxAuiMDIClientWindow::OnPageChanged(wxAuiNotebookEvent& evt)
     PageChanged(evt.GetOldSelection(), evt.GetSelection());
 }
 
-void wxAuiMDIClientWindow::OnSize(wxSizeEvent& evt)
-{
-    wxAuiNotebook::OnSize(evt);
-
-    for (size_t pos = 0; pos < GetPageCount(); pos++)
-        ((wxAuiMDIChildFrame *)GetPage(pos))->ApplyMDIChildFrameRect();
-}
-
 #endif //wxUSE_AUI
 #endif // wxUSE_MDI