diff -r cf448586f26a -r d792570a04b1 src/FOL/FOL.ML
--- a/src/FOL/FOL.ML	Thu Sep 27 15:42:30 2001 +0200
+++ b/src/FOL/FOL.ML	Thu Sep 27 16:04:11 2001 +0200
@@ -5,6 +5,7 @@
   val classical = classical;
 end;
 
-AddXIs [equal_intr_rule, disjI1, disjI2];
+AddXIs [equal_intr_rule];
+AddXEs [disjI1, disjI2];
 
 open FOL;