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-rw-r--r--src/pretty_print_coq.ml2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/pretty_print_coq.ml b/src/pretty_print_coq.ml
index 62ff2b3b..7a31465d 100644
--- a/src/pretty_print_coq.ml
+++ b/src/pretty_print_coq.ml
@@ -753,7 +753,7 @@ let condition_produces_constraint exp =
dependent pair with a proof that the result is the expected integer. This
is redundant for basic arithmetic functions and functions which we unfold
in the constraint solver. *)
-let no_Z_proof_fns = ["Z.add"; "Z.sub"; "Z.opp"; "Z.mul"; "length_mword"]
+let no_Z_proof_fns = ["Z.add"; "Z.sub"; "Z.opp"; "Z.mul"; "length_mword"; "length"]
let is_no_Z_proof_fn env id =
if Env.is_extern id env "coq"