--- ./glib/gunicode.h.orig	2005-08-18 13:46:10.000000000 -0400
+++ ./glib/gunicode.h	2005-08-18 13:44:39.000000000 -0400
@@ -68,6 +68,8 @@
 } GUnicodeType;
 
 /* These are the possible line break classifications.
+ * Note that new types may be added in the future.
+ * Implementations may regard unknown values like G_UNICODE_BREAK_UNKNOWN
  * See http://www.unicode.org/unicode/reports/tr14/
  */
 typedef enum
