diff --git a/winsup/cygwin/ChangeLog b/winsup/cygwin/ChangeLog
index 125b540da..f005d2986 100644
--- a/winsup/cygwin/ChangeLog
+++ b/winsup/cygwin/ChangeLog
@@ -1,3 +1,7 @@
+2002-09-06  Christopher Faylor  <cgf@redhat.com>
+
+	* winsup.h (_WIN32_WINNT): Define.
+
 2002-09-03  Corinna Vinschen  <corinna@vinschen.de>
 
 	* Makefile.in (DLL_OFILES): Drop shortcut.o.
diff --git a/winsup/cygwin/winsup.h b/winsup/cygwin/winsup.h
index 9e39728cc..ad2a77885 100644
--- a/winsup/cygwin/winsup.h
+++ b/winsup/cygwin/winsup.h
@@ -31,6 +31,8 @@ details. */
 #define NEW_MACRO_VARARGS
 #endif
 
+#define _WIN32_WINNT 0x0500
+
 #include <sys/types.h>
 #include <sys/strace.h>