diff -r 9537bf1c4853 -r 5b7a9633cfa8 src/HOL/Auth/OtwayReesBella.thy
--- a/src/HOL/Auth/OtwayReesBella.thy	Sun Nov 02 18:21:14 2014 +0100
+++ b/src/HOL/Auth/OtwayReesBella.thy	Sun Nov 02 18:21:45 2014 +0100
@@ -2,7 +2,7 @@
     Author:     Giampaolo Bella, Catania University
 *)
 
-header{*Bella's version of the Otway-Rees protocol*}
+section{*Bella's version of the Otway-Rees protocol*}
 
 
 theory OtwayReesBella imports Public begin