diff --git a/shared-bindings/wifi/Monitor.c b/shared-bindings/wifi/Monitor.c
index 0ddc8db4fd..8f1c9e2d90 100644
--- a/shared-bindings/wifi/Monitor.c
+++ b/shared-bindings/wifi/Monitor.c
@@ -55,7 +55,7 @@ STATIC mp_obj_t wifi_monitor_make_new(const mp_obj_type_t *type, size_t n_args,
     mp_arg_val_t args[MP_ARRAY_SIZE(allowed_args)];
     mp_arg_parse_all_kw_array(n_args, n_kw, all_args, MP_ARRAY_SIZE(allowed_args), allowed_args, args);
 
-    if (args[ARG_channel].u_int < 0 || args[ARG_channel].u_int > 11) {
+    if (args[ARG_channel].u_int < 0 || args[ARG_channel].u_int > 13) {
         mp_raise_ValueError_varg(translate("%q out of bounds"), MP_QSTR_channel);
     }