diff --git a/Interpolation/changes.txt b/Interpolation/changes.txt
index b5de2a7c778..9d884569b11 100644
--- a/Interpolation/changes.txt
+++ b/Interpolation/changes.txt
@@ -1,3 +1,6 @@
+28 June 2006 Raphaelle Chaine
+- Bug Fix in Sibson 3D natural neighbor coordinates to handle somes cases where the query point is located on the enveloppe of the convex-hull
+
 9 March 2006 Andreas Fabri
 - Changed names of demos