diff -r 6061ae1f90f2 -r 9bc16273c2d4 src/HOL/HoareParallel/Graph.thy
--- a/src/HOL/HoareParallel/Graph.thy	Fri Jun 17 11:35:35 2005 +0200
+++ b/src/HOL/HoareParallel/Graph.thy	Fri Jun 17 16:12:49 2005 +0200
@@ -3,7 +3,7 @@
 
 \section {Formalization of the Memory} *}
 
-theory Graph = Main:
+theory Graph imports Main begin
 
 datatype node = Black | White