diff --git a/src/include/netif/ppp/ppp.h b/src/include/netif/ppp/ppp.h
index 8ad4bc22..4046fd26 100644
--- a/src/include/netif/ppp/ppp.h
+++ b/src/include/netif/ppp/ppp.h
@@ -473,7 +473,7 @@ struct ppp_pcb_s {
  * Set a PPP interface as the default network interface
  * (used to output all packets for which no specific route is found).
  */
-void ppp_set_default(ppp_pcb *pcb);
+#define ppp_set_default(ppp)         netif_set_default(ppp->netif)
 
 /*
  * Set auth helper, optional, you can either fill ppp_pcb->settings.
diff --git a/src/netif/ppp/ppp.c b/src/netif/ppp/ppp.c
index 8c9d8a38..a314da7c 100644
--- a/src/netif/ppp/ppp.c
+++ b/src/netif/ppp/ppp.c
@@ -237,10 +237,6 @@ int ppp_init(void) {
     return 0;
 }
 
-void ppp_set_default(ppp_pcb *pcb) {
-  netif_set_default(pcb->netif);
-}
-
 void ppp_set_auth(ppp_pcb *pcb, u8_t authtype, const char *user, const char *passwd) {
 
 #if PAP_SUPPORT