diff --git a/src/msw/dialog.cpp b/src/msw/dialog.cpp
index aac6514841..20b10cd112 100644
--- a/src/msw/dialog.cpp
+++ b/src/msw/dialog.cpp
@@ -47,18 +47,6 @@
     #include <commdlg.h>
 #endif
 
-// ----------------------------------------------------------------------------
-// constants
-// ----------------------------------------------------------------------------
-
-// default dialog pos and size
-
-#define wxDIALOG_DEFAULT_X 300
-#define wxDIALOG_DEFAULT_Y 300
-
-#define wxDIALOG_DEFAULT_WIDTH 500
-#define wxDIALOG_DEFAULT_HEIGHT 500
-
 // ----------------------------------------------------------------------------
 // wxWin macros
 // ----------------------------------------------------------------------------