--- a/RELEASE_NOTES	Sun Apr 17 14:23:09 2011 +0200
+++ b/RELEASE_NOTES	Sun Apr 17 14:23:18 2011 +0200
@@ -22,6 +22,9 @@
 New user-visible features
 -------------------------
 
+  - int64x64_t is a new type which allows portable and easy to write arithmetic
+    calculations that require a high degree of fractional precision.
+
 Bugs fixed
 ----------
 The following lists many of the bugs fixed or small feature additions