diff --git a/src/include/netif/ppp/ppp_impl.h b/src/include/netif/ppp/ppp_impl.h
index d8c1f419..56a29a54 100644
--- a/src/include/netif/ppp/ppp_impl.h
+++ b/src/include/netif/ppp/ppp_impl.h
@@ -450,8 +450,8 @@ int sif6down (ppp_pcb *pcb);
 int sifnpmode(ppp_pcb *pcb, int proto, enum NPmode mode);
 #endif /* DEMAND_SUPPORt */
 
-void netif_set_mtu(ppp_pcb *pcb, int mtu);
-int netif_get_mtu(ppp_pcb *pcb);
+void ppp_netif_set_mtu(ppp_pcb *pcb, int mtu);
+int ppp_netif_get_mtu(ppp_pcb *pcb);
 
 #if CCP_SUPPORT
 #if 0 /* unused */
diff --git a/src/netif/ppp/ccp.c b/src/netif/ppp/ccp.c
index 6c2dadc9..86ecb9fb 100644
--- a/src/netif/ppp/ccp.c
+++ b/src/netif/ppp/ccp.c
@@ -1213,9 +1213,9 @@ static int ccp_reqci(fsm *f, u_char *p, int *lenp, int dont_nak) {
 		     * because MPPE frames **grow**.  The kernel [must]
 		     * allocate MPPE_PAD extra bytes in xmit buffers.
 		     */
-		    mtu = netif_get_mtu(pcb);
+		    mtu = ppp_netif_get_mtu(pcb);
 		    if (mtu)
-			netif_set_mtu(pcb, mtu - MPPE_PAD);
+			ppp_netif_set_mtu(pcb, mtu - MPPE_PAD);
 		    else
 			newret = CONFREJ;
 		}
diff --git a/src/netif/ppp/demand.c b/src/netif/ppp/demand.c
index 26c6c30d..872fe4d5 100644
--- a/src/netif/ppp/demand.c
+++ b/src/netif/ppp/demand.c
@@ -98,7 +98,7 @@ demand_conf()
     flush_flag = 0;
     fcs = PPP_INITFCS;
 
-    netif_set_mtu(pcb, LWIP_MIN(lcp_allowoptions[0].mru, PPP_MRU));
+    ppp_netif_set_mtu(pcb, LWIP_MIN(lcp_allowoptions[0].mru, PPP_MRU));
     if (ppp_send_config(pcb, PPP_MRU, (u32_t) 0, 0, 0) < 0
 	|| ppp_recv_config(pcb, PPP_MRU, (u32_t) 0, 0, 0) < 0)
 	    fatal("Couldn't set up demand-dialled PPP interface: %m");
diff --git a/src/netif/ppp/lcp.c b/src/netif/ppp/lcp.c
index bdd54516..f6dd4582 100644
--- a/src/netif/ppp/lcp.c
+++ b/src/netif/ppp/lcp.c
@@ -2314,7 +2314,7 @@ static void lcp_up(fsm *f) {
 #ifdef HAVE_MULTILINK
     if (!(multilink && go->neg_mrru && ho->neg_mrru))
 #endif /* HAVE_MULTILINK */
-	netif_set_mtu(pcb, LWIP_MIN(LWIP_MIN(mtu, mru), ao->mru));
+	ppp_netif_set_mtu(pcb, LWIP_MIN(LWIP_MIN(mtu, mru), ao->mru));
     ppp_send_config(pcb, mtu,
 		    (ho->neg_asyncmap? ho->asyncmap: 0xffffffff),
 		    ho->neg_pcompression, ho->neg_accompression);
diff --git a/src/netif/ppp/multilink.c b/src/netif/ppp/multilink.c
index 62014e8c..31df7642 100644
--- a/src/netif/ppp/multilink.c
+++ b/src/netif/ppp/multilink.c
@@ -148,12 +148,12 @@ mp_join_bundle()
 		if (demand) {
 			/* already have a bundle */
 			cfg_bundle(0, 0, 0, 0);
-			netif_set_mtu(pcb, mtu);
+			ppp_netif_set_mtu(pcb, mtu);
 			return 0;
 		}
 		make_new_bundle(0, 0, 0, 0);
 		set_ifunit(1);
-		netif_set_mtu(pcb, mtu);
+		ppp_netif_set_mtu(pcb, mtu);
 		return 0;
 	}
 
@@ -198,7 +198,7 @@ mp_join_bundle()
 	mtu = LWIP_MIN(ho->mrru, ao->mru);
 	if (demand) {
 		cfg_bundle(go->mrru, ho->mrru, go->neg_ssnhf, ho->neg_ssnhf);
-		netif_set_mtu(pcb, mtu);
+		ppp_netif_set_mtu(pcb, mtu);
 		script_setenv("BUNDLE", bundle_id + 7, 1);
 		return 0;
 	}
@@ -245,7 +245,7 @@ mp_join_bundle()
 	/* we have to make a new bundle */
 	make_new_bundle(go->mrru, ho->mrru, go->neg_ssnhf, ho->neg_ssnhf);
 	set_ifunit(1);
-	netif_set_mtu(pcb, mtu);
+	ppp_netif_set_mtu(pcb, mtu);
 	script_setenv("BUNDLE", bundle_id + 7, 1);
 	make_bundle_links(pcb);
 	unlock_db();
diff --git a/src/netif/ppp/ppp.c b/src/netif/ppp/ppp.c
index 4e7667e1..56b4f724 100644
--- a/src/netif/ppp/ppp.c
+++ b/src/netif/ppp/ppp.c
@@ -1031,13 +1031,13 @@ void new_phase(ppp_pcb *pcb, int p) {
  */
 int ppp_send_config(ppp_pcb *pcb, int mtu, u32_t accm, int pcomp, int accomp) {
   LWIP_UNUSED_ARG(mtu);
-  /* pcb->mtu = mtu; -- set correctly with netif_set_mtu */
+
+  PPPDEBUG(LOG_INFO, ("ppp_send_config[%d]\n", pcb->netif->num));
 
   if (pcb->link_cb->send_config) {
     pcb->link_cb->send_config(pcb, pcb->link_ctx_cb, accm, pcomp, accomp);
   }
 
-  PPPDEBUG(LOG_INFO, ("ppp_send_config[%d]\n", pcb->netif->num) );
   return 0;
 }
 
@@ -1048,11 +1048,12 @@ int ppp_send_config(ppp_pcb *pcb, int mtu, u32_t accm, int pcomp, int accomp) {
 int ppp_recv_config(ppp_pcb *pcb, int mru, u32_t accm, int pcomp, int accomp) {
   LWIP_UNUSED_ARG(mru);
 
+  PPPDEBUG(LOG_INFO, ("ppp_recv_config[%d]\n", pcb->netif->num));
+
   if (pcb->link_cb->recv_config) {
     pcb->link_cb->recv_config(pcb, pcb->link_ctx_cb, accm, pcomp, accomp);
   }
 
-  PPPDEBUG(LOG_INFO, ("ppp_recv_config[%d]\n", pcb->netif->num));
   return 0;
 }
 
@@ -1317,18 +1318,18 @@ int sifnpmode(ppp_pcb *pcb, int proto, enum NPmode mode) {
 #endif /* DEMAND_SUPPORT */
 
 /*
- * netif_set_mtu - set the MTU on the PPP network interface.
+ * ppp_netif_set_mtu - set the MTU on the PPP network interface.
  */
-void netif_set_mtu(ppp_pcb *pcb, int mtu) {
+void ppp_netif_set_mtu(ppp_pcb *pcb, int mtu) {
 
   pcb->netif->mtu = mtu;
-  PPPDEBUG(LOG_INFO, ("netif_set_mtu[%d]: mtu=%d\n", pcb->netif->num, mtu));
+  PPPDEBUG(LOG_INFO, ("ppp_netif_set_mtu[%d]: mtu=%d\n", pcb->netif->num, mtu));
 }
 
 /*
- * netif_get_mtu - get PPP interface MTU
+ * ppp_netif_get_mtu - get PPP interface MTU
  */
-int netif_get_mtu(ppp_pcb *pcb) {
+int ppp_netif_get_mtu(ppp_pcb *pcb) {
 
   return pcb->netif->mtu;
 }