diff --git a/ports/mimxrt/main.c b/ports/mimxrt/main.c
index dddf44e605..adb071a7fe 100644
--- a/ports/mimxrt/main.c
+++ b/ports/mimxrt/main.c
@@ -87,6 +87,7 @@ int main(void) {
         memcpy(&buf[0], "PYBD", 4);
         mp_hal_get_mac_ascii(MP_HAL_MAC_WLAN0, 8, 4, (char *)&buf[4]);
         cyw43_wifi_ap_set_ssid(&cyw43_state, 8, buf);
+        cyw43_wifi_ap_set_auth(&cyw43_state, CYW43_AUTH_WPA2_MIXED_PSK);
         cyw43_wifi_ap_set_password(&cyw43_state, 8, (const uint8_t *)"pybd0123");
     }
     #endif
diff --git a/ports/stm32/main.c b/ports/stm32/main.c
index 802a884d87..90a62c0244 100644
--- a/ports/stm32/main.c
+++ b/ports/stm32/main.c
@@ -477,6 +477,7 @@ void stm32_main(uint32_t reset_mode) {
         memcpy(&buf[0], "PYBD", 4);
         mp_hal_get_mac_ascii(MP_HAL_MAC_WLAN0, 8, 4, (char *)&buf[4]);
         cyw43_wifi_ap_set_ssid(&cyw43_state, 8, buf);
+        cyw43_wifi_ap_set_auth(&cyw43_state, CYW43_AUTH_WPA2_MIXED_PSK);
         cyw43_wifi_ap_set_password(&cyw43_state, 8, (const uint8_t *)"pybd0123");
     }
     #endif