From b396fcf2d604ed9b9952217539ff69e2f5fff3c5 Mon Sep 17 00:00:00 2001
From: Enrico Tassi <enrico.tassi@inria.fr>
Date: Wed, 27 Sep 2006 16:19:17 +0000
Subject: [PATCH] ...

---
 helm/software/matita/library/technicalities/setoids.ma | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/helm/software/matita/library/technicalities/setoids.ma b/helm/software/matita/library/technicalities/setoids.ma
index d730d06de..c440795ff 100644
--- a/helm/software/matita/library/technicalities/setoids.ma
+++ b/helm/software/matita/library/technicalities/setoids.ma
@@ -245,7 +245,8 @@ definition equality_morphism_of_symmetric_reflexive_transitive_relation:
     split;
     intro;
     unfold transitive in H;
-    auto
+    unfold symmetric in sym;
+    auto.
   ]
 qed.
 
-- 
2.39.2