diff --git a/components/esp_modem/examples/ap_to_pppos/main/ap_to_pppos.c b/components/esp_modem/examples/ap_to_pppos/main/ap_to_pppos.c
index a6ac822d4..d8ba31567 100644
--- a/components/esp_modem/examples/ap_to_pppos/main/ap_to_pppos.c
+++ b/components/esp_modem/examples/ap_to_pppos/main/ap_to_pppos.c
@@ -1,5 +1,5 @@
 /*
- * SPDX-FileCopyrightText: 2022-2023 Espressif Systems (Shanghai) CO LTD
+ * SPDX-FileCopyrightText: 2022-2025 Espressif Systems (Shanghai) CO LTD
  *
  * SPDX-License-Identifier: Unlicense OR CC0-1.0
  */
@@ -100,10 +100,10 @@ void wifi_init_softap(void)
     ESP_ERROR_CHECK(esp_wifi_init(&cfg));
 
     ESP_ERROR_CHECK(esp_event_handler_instance_register(WIFI_EVENT,
-                    ESP_EVENT_ANY_ID,
-                    &wifi_event_handler,
-                    NULL,
-                    NULL));
+                                                        ESP_EVENT_ANY_ID,
+                                                        &wifi_event_handler,
+                                                        NULL,
+                                                        NULL));
 
     wifi_config_t wifi_config = {
         .ap = {
@@ -120,7 +120,7 @@ void wifi_init_softap(void)
     }
 
     ESP_ERROR_CHECK(esp_wifi_set_mode(WIFI_MODE_AP));
-    ESP_ERROR_CHECK(esp_wifi_set_config(ESP_IF_WIFI_AP, &wifi_config));
+    ESP_ERROR_CHECK(esp_wifi_set_config(WIFI_IF_AP, &wifi_config));
     ESP_ERROR_CHECK(esp_wifi_start());
 
     ESP_LOGI(TAG, "wifi_init_softap finished. SSID:%s password:%s channel:%d",
diff --git a/components/esp_modem/port/linux/esp_netif_linux/lwipopts.h b/components/esp_modem/port/linux/esp_netif_linux/lwipopts.h
index edeed034e..b77fce432 100644
--- a/components/esp_modem/port/linux/esp_netif_linux/lwipopts.h
+++ b/components/esp_modem/port/linux/esp_netif_linux/lwipopts.h
@@ -89,7 +89,7 @@
 
 #define MPPE_SUPPORT                    0
 
-#define PPP_MAXIDLEFLAG                 0
+#define PPP_MAXIDLEFLAG                 100
 
 #define PRINTPKT_SUPPORT                1
 #define PPP_PROTOCOLNAME                1
diff --git a/components/esp_modem/port/linux/esp_netif_linux/tun_io.c b/components/esp_modem/port/linux/esp_netif_linux/tun_io.c
index 16f57e713..4ad4a5b1d 100644
--- a/components/esp_modem/port/linux/esp_netif_linux/tun_io.c
+++ b/components/esp_modem/port/linux/esp_netif_linux/tun_io.c
@@ -104,7 +104,7 @@ static void ppp_link_status_cb(ppp_pcb *pcb, int err_code, void *ctx)
     }
 }
 
-static u32_t ppp_output_cb(struct ppp_pcb_s *pcb, const void *data, u32_t len, void *ctx)
+static u32_t ppp_output_cb(struct ppp_pcb_s *pcb, u8_t *data, u32_t len, void *ctx)
 {
     esp_netif_t *netif = (esp_netif_t *)ctx;
     if (netif->transmit) {