diff --git a/include/wx/gtk/dvrenderers.h b/include/wx/gtk/dvrenderers.h
index 6bcda85b83..2e05380324 100644
--- a/include/wx/gtk/dvrenderers.h
+++ b/include/wx/gtk/dvrenderers.h
@@ -239,7 +239,7 @@ public:
 
     virtual bool Render( wxRect cell, wxDC *dc, int state );
     virtual wxSize GetSize() const;
-    virtual bool Activate( wxRect cell,
+    virtual bool Activate( const wxRect& cell,
                            wxDataViewModel *model,
                            const wxDataViewItem &item,
                            unsigned int col );
diff --git a/src/gtk/dataview.cpp b/src/gtk/dataview.cpp
index ac183545e9..da2b6d4e67 100644
--- a/src/gtk/dataview.cpp
+++ b/src/gtk/dataview.cpp
@@ -2758,7 +2758,7 @@ wxSize wxDataViewDateRenderer::GetSize() const
     return wxSize(x,y+d);
 }
 
-bool wxDataViewDateRenderer::Activate( wxRect WXUNUSED(cell), wxDataViewModel *model,
+bool wxDataViewDateRenderer::Activate( const wxRect& WXUNUSED(cell), wxDataViewModel *model,
                                        const wxDataViewItem &item, unsigned int col )
 {
     wxVariant variant;