diff -r 9537bf1c4853 -r 5b7a9633cfa8 src/HOL/Auth/Message.thy
--- a/src/HOL/Auth/Message.thy	Sun Nov 02 18:21:14 2014 +0100
+++ b/src/HOL/Auth/Message.thy	Sun Nov 02 18:21:45 2014 +0100
@@ -6,7 +6,7 @@
 Inductive relations "parts", "analz" and "synth"
 *)
 
-header{*Theory of Agents and Messages for Security Protocols*}
+section{*Theory of Agents and Messages for Security Protocols*}
 
 theory Message
 imports Main