diff --git a/include/wx/osx/carbon/private/print.h b/include/wx/osx/carbon/private/print.h
index b00fd619ef..3feafe6052 100644
--- a/include/wx/osx/carbon/private/print.h
+++ b/include/wx/osx/carbon/private/print.h
@@ -28,10 +28,10 @@ public:
 
     virtual bool            IsOk() const ;
 
-    virtual void            TransferFrom( wxPageSetupDialogData * );
+    virtual void            TransferFrom( const wxPageSetupDialogData * );
     virtual void            TransferTo( wxPageSetupDialogData * );
 
-    virtual void            TransferFrom( wxPrintDialogData * );
+    virtual void            TransferFrom( const wxPrintDialogData * );
     virtual void            TransferTo( wxPrintDialogData * );
 
     PMPrintSession          GetPrintSession() { return m_macPrintSession; }
diff --git a/src/osx/core/printmac.cpp b/src/osx/core/printmac.cpp
index 148d1b65af..abdea84e87 100644
--- a/src/osx/core/printmac.cpp
+++ b/src/osx/core/printmac.cpp
@@ -412,7 +412,7 @@ bool wxOSXPrintData::TransferTo( wxPrintData &data )
     return true ;
 }
 
-void wxOSXPrintData::TransferFrom( wxPageSetupDialogData *WXUNUSED(data) )
+void wxOSXPrintData::TransferFrom( const wxPageSetupDialogData *WXUNUSED(data) )
 {
     // should we setup the page rect here ?
     // since MacOS sometimes has two same paper rects with different
@@ -492,7 +492,7 @@ void wxOSXPrintData::TransferTo( wxPrintDialogData* data )
     }
 }
 
-void wxOSXPrintData::TransferFrom( wxPrintDialogData* data )
+void wxOSXPrintData::TransferFrom( const wxPrintDialogData* data )
 {
     // Respect the value of m_printAllPages
     if ( data->GetAllPages() )