diff --git a/src/msw/mdi.cpp b/src/msw/mdi.cpp
index 3624c580e9..1967ec43c4 100644
--- a/src/msw/mdi.cpp
+++ b/src/msw/mdi.cpp
@@ -302,7 +302,7 @@ void wxMDIParentFrame::SetWindowMenu(wxMenu* menu)
         if (GetMenuBar())
         {
             InsertWindowMenu(GetClientWindow(), m_hMenu,
-                             GetHMenuOf(m_windowMenu));
+                             GetHmenuOf(m_windowMenu));
         }
     }
 }