diff -r 6061ae1f90f2 -r 9bc16273c2d4 src/HOL/UNITY/Constrains.thy
--- a/src/HOL/UNITY/Constrains.thy	Fri Jun 17 11:35:35 2005 +0200
+++ b/src/HOL/UNITY/Constrains.thy	Fri Jun 17 16:12:49 2005 +0200
@@ -8,7 +8,7 @@
 
 header{*Weak Safety*}
 
-theory Constrains = UNITY:
+theory Constrains imports UNITY begin
 
 consts traces :: "['a set, ('a * 'a)set set] => ('a * 'a list) set"