diff --git a/LICENSE b/LICENSE
index 31eb9813f2..07c88b0a03 100644
--- a/LICENSE
+++ b/LICENSE
@@ -67,6 +67,8 @@ used during the build process and is not part of the compiled source code.
             /hal (BSD-3-clause)
             /simplelink (BSD-3-clause)
             /FreeRTOS (GPL-2.0 with FreeRTOS exception)
+        /esp32
+            /ppp_set_auth.* (Apache-2.0)
         /stm32
             /usbd*.c (MCD-ST Liberty SW License Agreement V2)
             /stm32_it.* (MIT + BSD-3-clause)
diff --git a/ports/esp32/main/CMakeLists.txt b/ports/esp32/main/CMakeLists.txt
index 425d70fdf0..4311af801c 100644
--- a/ports/esp32/main/CMakeLists.txt
+++ b/ports/esp32/main/CMakeLists.txt
@@ -53,6 +53,7 @@ set(MICROPY_SOURCE_DRIVERS
 
 set(MICROPY_SOURCE_PORT
     main.c
+    ppp_set_auth.c
     uart.c
     usb.c
     usb_serial_jtag.c
diff --git a/ports/esp32/ppp_set_auth.c b/ports/esp32/ppp_set_auth.c
new file mode 100644
index 0000000000..88ab668d48
--- /dev/null
+++ b/ports/esp32/ppp_set_auth.c
@@ -0,0 +1,35 @@
+/*
+ * SPDX-FileCopyrightText: 2019-2022 Espressif Systems (Shanghai) CO LTD
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+// The pppapi_set_auth function was made static in the ESP-IDF, so it's re-added here.
+// See ESP-IDF commit c67f4c2b4c2bb4b7740f988fc0f8a3e911e56afe
+
+#include "ppp_set_auth.h"
+
+#ifdef CONFIG_ESP_NETIF_TCPIP_LWIP
+
+#include "netif/ppp/pppapi.h"
+
+typedef struct {
+    struct tcpip_api_call_data call;
+    ppp_pcb *ppp;
+    u8_t authtype;
+    const char *user;
+    const char *passwd;
+} set_auth_msg_t;
+
+static err_t pppapi_do_ppp_set_auth(struct tcpip_api_call_data *m) {
+    set_auth_msg_t *msg = (set_auth_msg_t *)m;
+    ppp_set_auth(msg->ppp, msg->authtype, msg->user, msg->passwd);
+    return ERR_OK;
+}
+
+void pppapi_set_auth(ppp_pcb *pcb, u8_t authtype, const char *user, const char *passwd) {
+    set_auth_msg_t msg = { .ppp = pcb, .authtype = authtype, .user = user, .passwd = passwd};
+    tcpip_api_call(pppapi_do_ppp_set_auth, &msg.call);
+}
+
+#endif
diff --git a/ports/esp32/ppp_set_auth.h b/ports/esp32/ppp_set_auth.h
new file mode 100644
index 0000000000..67676ef4d6
--- /dev/null
+++ b/ports/esp32/ppp_set_auth.h
@@ -0,0 +1,22 @@
+/*
+ * SPDX-FileCopyrightText: 2022 Espressif Systems (Shanghai) CO LTD
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+// The pppapi_set_auth function was made static in the ESP-IDF, so it's re-added here.
+// See ESP-IDF commit c67f4c2b4c2bb4b7740f988fc0f8a3e911e56afe
+
+#pragma once
+
+#include "esp_netif.h"
+
+#ifdef CONFIG_ESP_NETIF_TCPIP_LWIP
+
+#include "lwip/netif.h"
+
+typedef struct ppp_pcb_s ppp_pcb;
+
+void pppapi_set_auth(ppp_pcb *pcb, u8_t authtype, const char *user, const char *passwd);
+
+#endif