diff -r ae18bb3075c3 -r 71f2155cdd85 src/HOL/Induct/ROOT.ML
--- a/src/HOL/Induct/ROOT.ML	Fri Jul 16 14:03:03 1999 +0200
+++ b/src/HOL/Induct/ROOT.ML	Fri Jul 16 14:03:33 1999 +0200
@@ -20,3 +20,4 @@
 time_use_thy "Term";
 time_use_thy "ABexp";
 time_use_thy "Exp";
+time_use_thy "Tree";