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-rw-r--r--py/objstr.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/py/objstr.c b/py/objstr.c
index 6812516b43..cf68e95fe8 100644
--- a/py/objstr.c
+++ b/py/objstr.c
@@ -309,7 +309,7 @@ STATIC mp_obj_t str_join(mp_obj_t self_in, mp_obj_t arg) {
// process args
uint seq_len;
mp_obj_t *seq_items;
- if (MP_OBJ_IS_TYPE(arg, &tuple_type)) {
+ if (MP_OBJ_IS_TYPE(arg, &mp_type_tuple)) {
mp_obj_tuple_get(arg, &seq_len, &seq_items);
} else if (MP_OBJ_IS_TYPE(arg, &list_type)) {
mp_obj_list_get(arg, &seq_len, &seq_items);