diff -r 7c5bca978886 -r 54aade5d0fe6 Nominal/Nominal2_Eqvt.thy
--- a/Nominal/Nominal2_Eqvt.thy	Mon Jan 17 12:33:37 2011 +0000
+++ b/Nominal/Nominal2_Eqvt.thy	Mon Jan 17 12:34:11 2011 +0000
@@ -24,7 +24,7 @@
 section {* eqvt lemmas *}
 
 lemmas [eqvt] =
-  conj_eqvt Not_eqvt ex_eqvt all_eqvt imp_eqvt uminus_eqvt
+  conj_eqvt Not_eqvt ex_eqvt all_eqvt ex1_eqvt imp_eqvt uminus_eqvt
   imp_eqvt[folded induct_implies_def]
   all_eqvt[folded induct_forall_def]