diff --git a/src/msw/dirdlg.cpp b/src/msw/dirdlg.cpp
index 092d9ef8d4..84557d7c95 100644
--- a/src/msw/dirdlg.cpp
+++ b/src/msw/dirdlg.cpp
@@ -147,18 +147,10 @@ DEFINE_GUID(IID_IFileDialog,
 // constants
 // ----------------------------------------------------------------------------
 
-#ifndef BIF_NEWDIALOGSTYLE
-    #define BIF_NEWDIALOGSTYLE 0x0040
-#endif
-
 #ifndef BIF_NONEWFOLDERBUTTON
     #define BIF_NONEWFOLDERBUTTON  0x0200
 #endif
 
-#ifndef BIF_EDITBOX
-    #define BIF_EDITBOX 16
-#endif
-
 // ----------------------------------------------------------------------------
 // wxWidgets macros
 // ----------------------------------------------------------------------------