diff --git a/src/espwifiutils.cpp b/src/espwifiutils.cpp
index 26fe4fc..d97b347 100644
--- a/src/espwifiutils.cpp
+++ b/src/espwifiutils.cpp
@@ -200,6 +200,24 @@ const char * toString(wifi_err_reason_t reason)
     return "UNKNOWN";
 }
 
+#ifdef CONFIG_PPP_SUPPORT
+std::string toString(esp_netif_auth_type_t authType)
+{
+    switch (authType)
+    {
+    case NETIF_PPP_AUTHTYPE_NONE:      return "NONE";
+    case NETIF_PPP_AUTHTYPE_PAP:       return "PAP";
+    case NETIF_PPP_AUTHTYPE_CHAP:      return "CHAP";
+    case NETIF_PPP_AUTHTYPE_MSCHAP:    return "MSCHAP";
+    case NETIF_PPP_AUTHTYPE_MSCHAP_V2: return "MSCHAP_V2";
+    case NETIF_PPP_AUTHTYPE_EAP:       return "EAP";
+    }
+
+    ESP_LOGW(TAG, "Unknown esp_netif_auth_type_t(%i)", std::to_underlying(authType));
+    return fmt::format("Unknown esp_netif_auth_type_t({})", std::to_underlying(authType));
+}
+#endif
+
 template<> std::expected<mac_t, std::string> fromString<mac_t>(std::string_view str)
 {
     mac_t result{};
diff --git a/src/espwifiutils.h b/src/espwifiutils.h
index 7d42a65..88e5cfe 100644
--- a/src/espwifiutils.h
+++ b/src/espwifiutils.h
@@ -13,6 +13,9 @@
 #include <esp_netif_ip_addr.h>
 #include <esp_netif_types.h>
 #include <lwip/ip_addr.h>
+#ifdef CONFIG_PPP_SUPPORT
+#include <esp_netif_ppp.h>
+#endif
 
 namespace wifi_stack {
 bool wifi_ap_config_equal(const wifi_ap_config_t& lhs, const wifi_ap_config_t& rhs);
@@ -24,6 +27,9 @@ std::string toString(wifi_bandwidth_t bandwidth);
 std::string toString(esp_interface_t interface);
 std::string toString(esp_netif_dhcp_status_t status);
 const char * toString(wifi_err_reason_t reason);
+#ifdef CONFIG_PPP_SUPPORT
+std::string toString(esp_netif_auth_type_t);
+#endif
 
 template<typename T> std::expected<T, std::string> fromString(std::string_view str) = delete;