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-rw-r--r--plugins/firstorder/instances.ml5
1 files changed, 4 insertions, 1 deletions
diff --git a/plugins/firstorder/instances.ml b/plugins/firstorder/instances.ml
index a717cc91e..fcbad46d4 100644
--- a/plugins/firstorder/instances.ml
+++ b/plugins/firstorder/instances.ml
@@ -22,6 +22,7 @@ open Formula
open Sequent
open Names
open Misctypes
+open Sigma.Notations
let compare_instance inst1 inst2=
match inst1,inst2 with
@@ -116,7 +117,9 @@ let mk_open_instance id idc gl m t=
let rec aux n avoid env evmap decls =
if Int.equal n 0 then evmap, decls else
let nid=(fresh_id avoid var_id gl) in
- let evmap, (c, _) = Evarutil.new_type_evar env evmap Evd.univ_flexible in
+ let evmap = Sigma.Unsafe.of_evar_map evmap in
+ let Sigma ((c, _), evmap, _) = Evarutil.new_type_evar env evmap Evd.univ_flexible in
+ let evmap = Sigma.to_evar_map evmap in
let decl = (Name nid,None,c) in
aux (n-1) (nid::avoid) (Environ.push_rel decl env) evmap (decl::decls) in
let evmap, decls = aux m [] env evmap [] in