diff options
Diffstat (limited to 'vernac/classes.ml')
| -rw-r--r-- | vernac/classes.ml | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/vernac/classes.ml b/vernac/classes.ml index 76d427add..3c133f317 100644 --- a/vernac/classes.ml +++ b/vernac/classes.ml @@ -293,7 +293,7 @@ let new_instance ?(abstract=false) ?(global=false) ?(refine= !refine_instance) (* Check that the type is free of evars now. *) Pretyping.check_evars env Evd.empty sigma termtype; let termtype = to_constr sigma termtype in - let term = Option.map (to_constr sigma) term in + let term = Option.map (to_constr ~abort_on_undefined_evars:false sigma) term in if not (Evd.has_undefined sigma) && not (Option.is_empty term) then declare_instance_constant k pri global imps ?hook id decl poly sigma (Option.get term) termtype |