diff -r f5bceeec9d91 -r 704713ca07ea src/HOL/MicroJava/J/Eval.thy
--- a/src/HOL/MicroJava/J/Eval.thy	Wed Feb 20 17:30:46 2002 +0100
+++ b/src/HOL/MicroJava/J/Eval.thy	Thu Feb 21 09:54:08 2002 +0100
@@ -4,7 +4,7 @@
     Copyright   1999 Technische Universitaet Muenchen
 *)
 
-header "Operational Evaluation (big step) Semantics"
+header {* \isaheader{Operational Evaluation (big step) Semantics} *}
 
 theory Eval = State + WellType: