1 files changed, 1 insertions, 1 deletions
diff --git a/py/binary.c b/py/binary.c
index 7c01cfa1c8..4fc8f751ad 100644
--- a/py/binary.c
+++ b/py/binary.c
@@ -338,7 +338,7 @@ mp_obj_t mp_binary_get_val(char struct_type, char val_type, byte *p_base, byte *
         return (mp_obj_t)(mp_uint_t)val;
     } else if (val_type == 'S') {
         const char *s_val = (const char *)(uintptr_t)(mp_uint_t)val;
-        return mp_obj_new_str(s_val, strlen(s_val));
+        return mp_obj_new_str_from_cstr(s_val);
     #if MICROPY_PY_BUILTINS_FLOAT
     } else if (val_type == 'e') {
         return mp_obj_new_float_from_f(mp_decode_half_float(val));