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-rw-r--r--pretyping/tacred.ml1
1 files changed, 1 insertions, 0 deletions
diff --git a/pretyping/tacred.ml b/pretyping/tacred.ml
index 2768bb3fea..fbf9b34776 100644
--- a/pretyping/tacred.ml
+++ b/pretyping/tacred.ml
@@ -314,6 +314,7 @@ and construct_const env sigma =
| None -> assert false
| Some (c',rest) ->
stacklam hnfstack [c'] c rest)
+ | IsLetIn (n,b,t,c) -> stacklam hnfstack [b] c stack
| IsMutCase (ci,p,c,lf) ->
hnfstack
(special_red_case env (construct_const env sigma) (ci,p,c,lf), stack)