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-rw-r--r--proofs/clenv.ml2
1 files changed, 1 insertions, 1 deletions
diff --git a/proofs/clenv.ml b/proofs/clenv.ml
index ebb4ab684..fee6ce40f 100644
--- a/proofs/clenv.ml
+++ b/proofs/clenv.ml
@@ -1002,7 +1002,7 @@ let clenv_match_args s clause =
and c_typ = w_hnf_constr clause.hook (w_type_of clause.hook c) in
(* whd_betaiota was before in type_of - useful to reduce types like *)
(* (x:A)([x]P u) *)
- let c_typ = whd_betaiota c_typ in
+ let c_typ = nf_betaiota c_typ in
matchrec
(clenv_assign k c (clenv_unify true CUMUL c_typ k_typ clause)) t
in