diff --git a/src/msw/calctrl.cpp b/src/msw/calctrl.cpp
index ac0d8bbd76..8b6f359fa5 100644
--- a/src/msw/calctrl.cpp
+++ b/src/msw/calctrl.cpp
@@ -108,7 +108,7 @@ wxCalendarCtrl::Create(wxWindow *parent,
     }
 
     const wxChar * const clsname = s_clsMonthCal.IsRegistered()
-        ? s_clsMonthCal.GetName().t_str()
+        ? static_cast<const wxChar*>(s_clsMonthCal.GetName().t_str())
         : MONTHCAL_CLASS;
 
     if ( !MSWCreateControl(clsname, wxEmptyString, pos, size) )