diff --git a/src/netif/ppp/demand.c b/src/netif/ppp/demand.c
index 872fe4d5..709e5ea1 100644
--- a/src/netif/ppp/demand.c
+++ b/src/netif/ppp/demand.c
@@ -86,8 +86,8 @@ demand_conf()
     const struct protent *protp;
 
 /*    framemax = lcp_allowoptions[0].mru;
-    if (framemax < PPP_MRU) */
-	framemax = PPP_MRU;
+    if (framemax < PPP_DEFMRU) */
+	framemax = PPP_DEFMRU;
     framemax += PPP_HDRLEN + PPP_FCSLEN;
     frame = malloc(framemax);
     if (frame == NULL)
@@ -98,9 +98,9 @@ demand_conf()
     flush_flag = 0;
     fcs = PPP_INITFCS;
 
-    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)
+    ppp_netif_set_mtu(pcb, LWIP_MIN(lcp_allowoptions[0].mru, PPP_DEFMRU));
+    if (ppp_send_config(pcb, PPP_DEFMRU, (u32_t) 0, 0, 0) < 0
+	|| ppp_recv_config(pcb, PPP_DEFMRU, (u32_t) 0, 0, 0) < 0)
 	    fatal("Couldn't set up demand-dialled PPP interface: %m");
 
 #ifdef PPP_FILTER
diff --git a/src/netif/ppp/lcp.c b/src/netif/ppp/lcp.c
index f6dd4582..eefdd314 100644
--- a/src/netif/ppp/lcp.c
+++ b/src/netif/ppp/lcp.c
@@ -462,11 +462,11 @@ void lcp_lowerup(ppp_pcb *pcb) {
      * but accept A/C and protocol compressed packets
      * if we are going to ask for A/C and protocol compression.
      */
-    if (ppp_send_config(pcb, PPP_MRU, 0xffffffff, 0, 0) < 0
-	|| ppp_recv_config(pcb, PPP_MRU, (pcb->settings.lax_recv? 0: 0xffffffff),
+    if (ppp_send_config(pcb, PPP_DEFMRU, 0xffffffff, 0, 0) < 0
+	|| ppp_recv_config(pcb, PPP_DEFMRU, (pcb->settings.lax_recv? 0: 0xffffffff),
 			   wo->neg_pcompression, wo->neg_accompression) < 0)
 	    return;
-    pcb->peer_mru = PPP_MRU;
+    pcb->peer_mru = PPP_DEFMRU;
 
     if (pcb->settings.listen_time != 0) {
 	f->flags |= DELAYED_UP;
@@ -757,7 +757,7 @@ static void lcp_resetci(fsm *f) {
 #endif /* HAVE_MULTILINK */
     if (pcb->settings.noendpoint)
 	ao->neg_endpoint = 0;
-    pcb->peer_mru = PPP_MRU;
+    pcb->peer_mru = PPP_DEFMRU;
 #if 0 /* UNUSED */
     auth_reset(pcb);
 #endif /* UNUSED */
@@ -2309,8 +2309,8 @@ static void lcp_up(fsm *f) {
      * the interface MTU is set to the lowest of that, the
      * MTU we want to use, and our link MRU.
      */
-    mtu = ho->neg_mru? ho->mru: PPP_MRU;
-    mru = go->neg_mru? LWIP_MAX(wo->mru, go->mru): PPP_MRU;
+    mtu = ho->neg_mru? ho->mru: PPP_DEFMRU;
+    mru = go->neg_mru? LWIP_MAX(wo->mru, go->mru): PPP_DEFMRU;
 #ifdef HAVE_MULTILINK
     if (!(multilink && go->neg_mrru && ho->neg_mrru))
 #endif /* HAVE_MULTILINK */
@@ -2344,11 +2344,11 @@ static void lcp_down(fsm *f) {
 
     link_down(pcb);
 
-    ppp_send_config(pcb, PPP_MRU, 0xffffffff, 0, 0);
-    ppp_recv_config(pcb, PPP_MRU,
+    ppp_send_config(pcb, PPP_DEFMRU, 0xffffffff, 0, 0);
+    ppp_recv_config(pcb, PPP_DEFMRU,
 		    (go->neg_asyncmap? go->asyncmap: 0xffffffff),
 		    go->neg_pcompression, go->neg_accompression);
-    pcb->peer_mru = PPP_MRU;
+    pcb->peer_mru = PPP_DEFMRU;
 }
 
 
diff --git a/src/netif/ppp/multilink.c b/src/netif/ppp/multilink.c
index 31df7642..795d6b50 100644
--- a/src/netif/ppp/multilink.c
+++ b/src/netif/ppp/multilink.c
@@ -142,7 +142,7 @@ mp_join_bundle()
 		/* not doing multilink */
 		if (go->neg_mrru)
 			notice("oops, multilink negotiated only for receive");
-		mtu = ho->neg_mru? ho->mru: PPP_MRU;
+		mtu = ho->neg_mru? ho->mru: PPP_DEFMRU;
 		if (mtu > ao->mru)
 			mtu = ao->mru;
 		if (demand) {