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-rw-r--r--src/rewrites.ml3
1 files changed, 2 insertions, 1 deletions
diff --git a/src/rewrites.ml b/src/rewrites.ml
index 2b5a1f94..8a222431 100644
--- a/src/rewrites.ml
+++ b/src/rewrites.ml
@@ -2836,7 +2836,8 @@ let rec rewrite_defs_pat_string_append =
in
let builtins = [
- ("integer", ("maybe_atoi", int_typ));
+ ("int", ("maybe_int_of_prefix", int_typ));
+ ("nat", ("maybe_nat_of_prefix", nat_typ));
] in
let (new_pat, new_guards, new_expr) =