diff -r f5bceeec9d91 -r 704713ca07ea src/HOL/MicroJava/BV/Correct.thy
--- a/src/HOL/MicroJava/BV/Correct.thy	Wed Feb 20 17:30:46 2002 +0100
+++ b/src/HOL/MicroJava/BV/Correct.thy	Thu Feb 21 09:54:08 2002 +0100
@@ -7,7 +7,7 @@
 The invariant for the type safety proof.
 *)
 
-header "BV Type Safety Invariant"
+header {* \isaheader{BV Type Safety Invariant} *}
 
 theory Correct = BVSpec + JVMExec: