diff --git a/doc/ppp.txt b/doc/ppp.txt
index f5ffc0cd..52fa3877 100644
--- a/doc/ppp.txt
+++ b/doc/ppp.txt
@@ -79,14 +79,14 @@ static void status_cb(ppp_pcb *pcb, int err_code, void *ctx) {
 #endif /* LWIP_DNS */
       printf("status_cb: Connected\n");
 #if PPP_IPV4_SUPPORT
-      printf("   our_ipaddr  = %s\n", ip_ntoa(&pppif->ip_addr));
-      printf("   his_ipaddr  = %s\n", ip_ntoa(&pppif->gw));
-      printf("   netmask     = %s\n", ip_ntoa(&pppif->netmask));
+      printf("   our_ipaddr  = %s\n", ipaddr_ntoa(&pppif->ip_addr));
+      printf("   his_ipaddr  = %s\n", ipaddr_ntoa(&pppif->gw));
+      printf("   netmask     = %s\n", ipaddr_ntoa(&pppif->netmask));
 #if LWIP_DNS
       ns = dns_getserver(0);
-      printf("   dns1        = %s\n", ip_ntoa(&ns));
+      printf("   dns1        = %s\n", ipaddr_ntoa(&ns));
       ns = dns_getserver(1);
-      printf("   dns2        = %s\n", ip_ntoa(&ns));
+      printf("   dns2        = %s\n", ipaddr_ntoa(&ns));
 #endif /* LWIP_DNS */
 #endif /* PPP_IPV4_SUPPORT */
 #if PPP_IPV6_SUPPORT