diff --git a/ports/esp32/network_ppp.c b/ports/esp32/network_ppp.c
index 5c41cf948c1e..6104ba7ce509 100644
--- a/ports/esp32/network_ppp.c
+++ b/ports/esp32/network_ppp.c
@@ -145,7 +145,7 @@ static mp_obj_t ppp_active(size_t n_args, const mp_obj_t *args) {
                 return mp_const_true;
             }
 
-            self->pcb = pppapi_pppos_create(&self->pppif, ppp_output_callback, ppp_status_cb, self);
+            self->pcb = pppapi_pppos_create(&self->pppif, (void *)ppp_output_callback, ppp_status_cb, self);
 
             if (self->pcb == NULL) {
                 mp_raise_msg(&mp_type_RuntimeError, MP_ERROR_TEXT("init failed"));
diff --git a/ports/esp32/network_wlan.c b/ports/esp32/network_wlan.c
index fed81d28cb6a..00b95d42b42c 100644
--- a/ports/esp32/network_wlan.c
+++ b/ports/esp32/network_wlan.c
@@ -770,7 +770,9 @@ static const mp_rom_map_elem_t wlan_if_locals_dict_table[] = {
 };
 static MP_DEFINE_CONST_DICT(wlan_if_locals_dict, wlan_if_locals_dict_table);
 
-#if ESP_IDF_VERSION >= ESP_IDF_VERSION_VAL(5, 3, 0)
+#if ESP_IDF_VERSION >= ESP_IDF_VERSION_VAL(5, 4, 0)
+_Static_assert(WIFI_AUTH_MAX == 16, "Synchronize WIFI_AUTH_XXX constants with the ESP-IDF. Look at esp-idf/components/esp_wifi/include/esp_wifi_types_generic.h");
+#elif ESP_IDF_VERSION >= ESP_IDF_VERSION_VAL(5, 3, 0)
 _Static_assert(WIFI_AUTH_MAX == 14, "Synchronize WIFI_AUTH_XXX constants with the ESP-IDF. Look at esp-idf/components/esp_wifi/include/esp_wifi_types_generic.h");
 #elif ESP_IDF_VERSION >= ESP_IDF_VERSION_VAL(5, 2, 0)
 _Static_assert(WIFI_AUTH_MAX == 13, "Synchronize WIFI_AUTH_XXX constants with the ESP-IDF. Look at esp-idf/components/esp_wifi/include/esp_wifi_types.h");
diff --git a/py/persistentcode.c b/py/persistentcode.c
index 0843d1a2c52e..840ee49d3e4e 100644
--- a/py/persistentcode.c
+++ b/py/persistentcode.c
@@ -402,7 +402,7 @@ static mp_raw_code_t *load_raw_code(mp_reader_t *reader, mp_module_context_t *co
 
     #if MICROPY_EMIT_MACHINE_CODE
     } else {
-        const uint8_t *prelude_ptr;
+        const uint8_t *prelude_ptr = NULL;
         #if MICROPY_EMIT_NATIVE_PRELUDE_SEPARATE_FROM_MACHINE_CODE
         if (kind == MP_CODE_NATIVE_PY) {
             // Executable code cannot be accessed byte-wise on this architecture, so copy