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-rw-r--r--pretyping/retyping.ml2
1 files changed, 1 insertions, 1 deletions
diff --git a/pretyping/retyping.ml b/pretyping/retyping.ml
index e4c900b31..5ed6e6051 100644
--- a/pretyping/retyping.ml
+++ b/pretyping/retyping.ml
@@ -96,7 +96,7 @@ let typeur sigma metamap =
| _ -> outsort env sigma (type_of env t)
and sort_family_of env t =
- match kind_of_term t with
+ match kind_of_term (whd_betadeltaiota env sigma t) with
| IsCast (c,s) when isSort s -> family_of_sort (destSort s)
| IsSort (Prop c) -> InType
| IsSort (Type u) -> InType