1 files changed, 1 insertions, 1 deletions
diff --git a/extmod/modlwip.c b/extmod/modlwip.c
index bcee3f0ff1..b07c1d8159 100644
--- a/extmod/modlwip.c
+++ b/extmod/modlwip.c
@@ -373,7 +373,7 @@ mp_obj_t lwip_format_inet_addr(const ip_addr_t *ip, mp_uint_t port) {
     char ipstr[IPADDR_STRLEN_MAX];
     ipaddr_ntoa_r(ip, ipstr, sizeof(ipstr));
     mp_obj_t tuple[2] = {
-        tuple[0] = mp_obj_new_str(ipstr, strlen(ipstr)),
+        tuple[0] = mp_obj_new_str_from_cstr(ipstr),
         tuple[1] = mp_obj_new_int(port),
     };
     return mp_obj_new_tuple(2, tuple);