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-rw-r--r--kernel/reduction.ml2
1 files changed, 1 insertions, 1 deletions
diff --git a/kernel/reduction.ml b/kernel/reduction.ml
index 892557ac6c..939eeef5d5 100644
--- a/kernel/reduction.ml
+++ b/kernel/reduction.ml
@@ -136,7 +136,7 @@ let betazeta_appvect n c v =
if Int.equal n 0 then applist (substl env t, stack) else
match kind_of_term t, stack with
Lambda(_,_,c), arg::stacktl -> stacklam (n-1) (arg::env) c stacktl
- | LetIn(_,b,_,c), _ -> stacklam (n-1) (b::env) c stack
+ | LetIn(_,b,_,c), _ -> stacklam (n-1) (substl env b::env) c stack
| _ -> anomaly (Pp.str "Not enough lambda/let's") in
stacklam n [] c (Array.to_list v)