diff --git a/winsup/cygwin/ChangeLog b/winsup/cygwin/ChangeLog
index 25db5f77c..893bbb33b 100644
--- a/winsup/cygwin/ChangeLog
+++ b/winsup/cygwin/ChangeLog
@@ -1,3 +1,7 @@
+2002-06-08  Christopher Faylor  <cgf@redhat.com>
+
+	* include/wchar.h: Define __need_size_t.
+
 2002-06-07  Christopher Faylor  <cgf@redhat.com>
 
 	* fhandler_socket.cc (fhandler_socket::fstat): Don't assume that socket
diff --git a/winsup/cygwin/include/wchar.h b/winsup/cygwin/include/wchar.h
index eabdaa725..bf3f017a2 100644
--- a/winsup/cygwin/include/wchar.h
+++ b/winsup/cygwin/include/wchar.h
@@ -16,6 +16,7 @@ details. */
 /* Get wchar_t and wint_t from <stddef.h>.  */
 #define __need_wchar_t
 #define __need_wint_t
+#define __need_size_t
 #include <stddef.h>
 
 __BEGIN_DECLS