diff -r 9537bf1c4853 -r 5b7a9633cfa8 src/HOL/Imperative_HOL/Heap_Monad.thy
--- a/src/HOL/Imperative_HOL/Heap_Monad.thy	Sun Nov 02 18:21:14 2014 +0100
+++ b/src/HOL/Imperative_HOL/Heap_Monad.thy	Sun Nov 02 18:21:45 2014 +0100
@@ -2,7 +2,7 @@
     Author:     John Matthews, Galois Connections; Alexander Krauss, Lukas Bulwahn & Florian Haftmann, TU Muenchen
 *)
 
-header {* A monad with a polymorphic heap and primitive reasoning infrastructure *}
+section {* A monad with a polymorphic heap and primitive reasoning infrastructure *}
 
 theory Heap_Monad
 imports