diff -r b33912e68b84 -r 765c22baa1c9 CONTRIBUTORS
--- a/CONTRIBUTORS	Sun Dec 16 22:10:37 2012 +0100
+++ b/CONTRIBUTORS	Mon Dec 17 08:19:35 2012 +0100
@@ -17,6 +17,9 @@
   Various improvements to Sledgehammer's Isar proof generator, including
   a smart type annotation algorithm and proof shrinking.
 
+* December 2012: Alessandro Coglio, Kestrel
+  Contributions to HOL's Lattice library
+
 * November 2012: Fabian Immler, TUM
   "Symbols" dockable for Isabelle/jEdit.