diff --git a/setup.h.in b/setup.h.in
index 6436ddd2d1..2396eafd41 100644
--- a/setup.h.in
+++ b/setup.h.in
@@ -99,6 +99,13 @@
 #define wxUSE_NATIVE_STATUSBAR 1
 #endif
 
+/* enable rich edit under Win32 */
+#if defined(__WIN95__) && !defined(__TWIN32__) && !defined(__GNUWIN32_OLD__)
+#define wxUSE_RICHEDIT 1
+#else
+#define wxUSE_RICHEDIT 0
+#endif
+
 /*
  * Supports bool type
  */