--- a/Quot/quotient_tacs.ML	Mon Jan 25 17:53:08 2010 +0100
+++ b/Quot/quotient_tacs.ML	Mon Jan 25 18:13:44 2010 +0100
@@ -526,7 +526,8 @@
 
   fun mk_simps thms = (mk_minimal_ss lthy) addsimps thms addSolver quotient_solver
   val ss1 = mk_simps (defs @ prs @ @{thms babs_prs all_prs ex_prs ex1_prs})
-  val ss2 = mk_simps (@{thms Quotient_abs_rep Quotient_rel_rep ex1_prs} @ ids)
+  val ss2 = mk_simps (@{thms Quotient_abs_rep[THEN eq_reflection] 
+                             Quotient_rel_rep[THEN eq_reflection] ex1_prs} @ ids)
 in
   EVERY' [simp_tac ss1,
           fun_map_tac lthy,