diff --git a/include/wx/sizer.h b/include/wx/sizer.h
index 9ac8077b7d..b97b7c0854 100644
--- a/include/wx/sizer.h
+++ b/include/wx/sizer.h
@@ -655,8 +655,6 @@ protected:
     // the window this sizer is used in, can be NULL
     wxWindow *m_containingWindow;
 
-    wxSize GetMaxWindowSize( wxWindow *window ) const;
-    wxSize GetMinWindowSize( wxWindow *window );
     wxSize GetMaxClientSize( wxWindow *window ) const;
     wxSize GetMinClientSize( wxWindow *window );
     wxSize VirtualFitSize( wxWindow *window );
diff --git a/src/common/sizer.cpp b/src/common/sizer.cpp
index 38753c7544..cc81970cb5 100644
--- a/src/common/sizer.cpp
+++ b/src/common/sizer.cpp
@@ -940,16 +940,6 @@ void wxSizer::SetVirtualSizeHints( wxWindow *window )
 }
 #endif // WXWIN_COMPATIBILITY_2_8
 
-wxSize wxSizer::GetMaxWindowSize( wxWindow *window ) const
-{
-    return window->GetMaxSize();
-}
-
-wxSize wxSizer::GetMinWindowSize( wxWindow *window )
-{
-    return window->ClientToWindowSize(GetMinSize());
-}
-
 // TODO on mac we need a function that determines how much free space this
 // min size contains, in order to make sure that we have 20 pixels of free
 // space around the controls