diff --git a/samples/opengl/cube/cube.cpp b/samples/opengl/cube/cube.cpp
index ea9a826542..66bac043e0 100644
--- a/samples/opengl/cube/cube.cpp
+++ b/samples/opengl/cube/cube.cpp
@@ -191,13 +191,13 @@ TestGLCanvas::TestGLCanvas(wxWindow *parent, wxWindowID id,
     m_rright = WXK_RIGHT;
 }
 
-TestGLCanvas::TestGLCanvas(wxWindow *parent, const TestGLCanvas &other,
+TestGLCanvas::TestGLCanvas(wxWindow *parent, const TestGLCanvas *other,
     wxWindowID id, const wxPoint& pos, const wxSize& size, long style,
     const wxString& name )
-    : wxGLCanvas(parent, other.GetContext(), id, pos, size, style|wxFULL_REPAINT_ON_RESIZE , name)
+    : wxGLCanvas(parent, other->GetContext(), id, pos, size, style|wxFULL_REPAINT_ON_RESIZE , name)
 {
     m_init = false;
-    m_gllist = other.m_gllist; // share display list
+    m_gllist = other->m_gllist; // share display list
     m_rleft = WXK_LEFT;
     m_rright = WXK_RIGHT;
 }
diff --git a/samples/opengl/cube/cube.h b/samples/opengl/cube/cube.h
index 077d4f16d9..f50ea2a049 100644
--- a/samples/opengl/cube/cube.h
+++ b/samples/opengl/cube/cube.h
@@ -56,7 +56,7 @@ public:
         const wxSize& size = wxDefaultSize,
         long style = 0, const wxString& name = _T("TestGLCanvas") );
 
-    TestGLCanvas( wxWindow *parent, const TestGLCanvas &other,
+    TestGLCanvas( wxWindow *parent, const TestGLCanvas *other,
         wxWindowID id = wxID_ANY, const wxPoint& pos = wxDefaultPosition,
         const wxSize& size = wxDefaultSize, long style = 0,
         const wxString& name = _T("TestGLCanvas") );