diff --git a/contrib/ports/win32/pcapif.c b/contrib/ports/win32/pcapif.c
index be0fb7bf..3066abd0 100644
--- a/contrib/ports/win32/pcapif.c
+++ b/contrib/ports/win32/pcapif.c
@@ -732,7 +732,7 @@ pcapif_low_level_init(struct netif *netif)
     adapter_num = (LWIP_PTR_NUMERIC_CAST(int, netif->state)) - 1;
     if (adapter_num < 0) {
       printf("ERROR: invalid adapter index \"%d\"!\n", adapter_num);
-      LWIP_ASSERT("ERROR initializing network adapter!\n", 0);
+      LWIP_ASSERT("ERROR initializing network adapter!", 0);
       return;
     }
   }
@@ -758,7 +758,7 @@ pcapif_low_level_init(struct netif *netif)
   adapter_num = get_adapter_index(PACKET_LIB_ADAPTER_GUID);
   if (adapter_num < 0) {
     printf("ERROR finding network adapter with GUID \"%s\"!\n", PACKET_LIB_ADAPTER_GUID);
-    LWIP_ASSERT("ERROR initializing network adapter!\n", 0);
+    LWIP_ASSERT("ERROR initializing network adapter!", 0);
     return;
   }
 #endif /* PACKET_LIB_ADAPTER_GUID */
diff --git a/src/core/ipv4/icmp.c b/src/core/ipv4/icmp.c
index de6d1e85..cee48c53 100644
--- a/src/core/ipv4/icmp.c
+++ b/src/core/ipv4/icmp.c
@@ -179,7 +179,7 @@ icmp_input(struct pbuf *p, struct netif *inp)
         MEMCPY(r->payload, iphdr_in, hlen);
         /* switch r->payload back to icmp header (cannot fail) */
         if (pbuf_remove_header(r, hlen)) {
-          LWIP_ASSERT("icmp_input: moving r->payload to icmp header failed\n", 0);
+          LWIP_ASSERT("icmp_input: moving r->payload to icmp header failed", 0);
           pbuf_free(r);
           goto icmperr;
         }
@@ -196,7 +196,7 @@ icmp_input(struct pbuf *p, struct netif *inp)
       } else {
         /* restore p->payload to point to icmp header (cannot fail) */
         if (pbuf_remove_header(p, hlen + PBUF_LINK_HLEN + PBUF_LINK_ENCAPSULATION_HLEN)) {
-          LWIP_ASSERT("icmp_input: restoring original p->payload failed\n", 0);
+          LWIP_ASSERT("icmp_input: restoring original p->payload failed", 0);
           goto icmperr;
         }
       }
diff --git a/src/core/ipv6/ip6_frag.c b/src/core/ipv6/ip6_frag.c
index 8b352f56..6617e0d2 100644
--- a/src/core/ipv6/ip6_frag.c
+++ b/src/core/ipv6/ip6_frag.c
@@ -166,7 +166,7 @@ ip6_reass_free_complete_datagram(struct ip6_reassdata *ipr)
     /* Then, move back to the original ipv6 header (we are now pointing to Fragment header).
        This cannot fail since we already checked when receiving this fragment. */
     if (pbuf_header_force(p, (s16_t)((u8_t*)p->payload - (u8_t*)ipr->iphdr))) {
-      LWIP_ASSERT("ip6_reass_free: moving p->payload to ip6 header failed\n", 0);
+      LWIP_ASSERT("ip6_reass_free: moving p->payload to ip6 header failed", 0);
     }
     else {
       /* Reconstruct the zoned source and destination addresses, so that we do
@@ -652,7 +652,7 @@ ip6_reass(struct pbuf *p)
 
     /* Move pbuf back to IPv6 header. This should never fail. */
     if (pbuf_header_force(p, (s16_t)((u8_t*)p->payload - (u8_t*)iphdr_ptr))) {
-      LWIP_ASSERT("ip6_reass: moving p->payload to ip6 header failed\n", 0);
+      LWIP_ASSERT("ip6_reass: moving p->payload to ip6 header failed", 0);
       pbuf_free(p);
       return NULL;
     }
diff --git a/src/core/tcp.c b/src/core/tcp.c
index 5a62c556..c600ad5d 100644
--- a/src/core/tcp.c
+++ b/src/core/tcp.c
@@ -1215,9 +1215,9 @@ tcp_slowtmr_start:
   }
   while (pcb != NULL) {
     LWIP_DEBUGF(TCP_DEBUG, ("tcp_slowtmr: processing active pcb\n"));
-    LWIP_ASSERT("tcp_slowtmr: active pcb->state != CLOSED\n", pcb->state != CLOSED);
-    LWIP_ASSERT("tcp_slowtmr: active pcb->state != LISTEN\n", pcb->state != LISTEN);
-    LWIP_ASSERT("tcp_slowtmr: active pcb->state != TIME-WAIT\n", pcb->state != TIME_WAIT);
+    LWIP_ASSERT("tcp_slowtmr: active pcb->state != CLOSED", pcb->state != CLOSED);
+    LWIP_ASSERT("tcp_slowtmr: active pcb->state != LISTEN", pcb->state != LISTEN);
+    LWIP_ASSERT("tcp_slowtmr: active pcb->state != TIME-WAIT", pcb->state != TIME_WAIT);
     if (pcb->last_timer == tcp_timer_ctr) {
       /* skip this pcb, we have already processed it */
       prev = pcb;
diff --git a/src/core/tcp_in.c b/src/core/tcp_in.c
index 90061281..dba4c374 100644
--- a/src/core/tcp_in.c
+++ b/src/core/tcp_in.c
@@ -1486,7 +1486,7 @@ tcp_receive(struct tcp_pcb *pcb)
           }
           pbuf_realloc(inseg.p, inseg.len);
           tcplen = TCP_TCPLEN(&inseg);
-          LWIP_ASSERT("tcp_receive: segment not trimmed correctly to rcv_wnd\n",
+          LWIP_ASSERT("tcp_receive: segment not trimmed correctly to rcv_wnd",
                       (seqno + tcplen) == (pcb->rcv_nxt + pcb->rcv_wnd));
         }
 #if TCP_QUEUE_OOSEQ
@@ -1535,7 +1535,7 @@ tcp_receive(struct tcp_pcb *pcb)
               }
               pbuf_realloc(inseg.p, inseg.len);
               tcplen = TCP_TCPLEN(&inseg);
-              LWIP_ASSERT("tcp_receive: segment not trimmed correctly to ooseq queue\n",
+              LWIP_ASSERT("tcp_receive: segment not trimmed correctly to ooseq queue",
                           (seqno + tcplen) == next->tcphdr->seqno);
             }
             pcb->ooseq = next;
@@ -1546,7 +1546,7 @@ tcp_receive(struct tcp_pcb *pcb)
         pcb->rcv_nxt = seqno + tcplen;
 
         /* Update the receiver's (our) window. */
-        LWIP_ASSERT("tcp_receive: tcplen > rcv_wnd\n", pcb->rcv_wnd >= tcplen);
+        LWIP_ASSERT("tcp_receive: tcplen > rcv_wnd", pcb->rcv_wnd >= tcplen);
         pcb->rcv_wnd -= tcplen;
 
         tcp_update_rcv_ann_wnd(pcb);
@@ -1582,7 +1582,7 @@ tcp_receive(struct tcp_pcb *pcb)
           seqno = pcb->ooseq->tcphdr->seqno;
 
           pcb->rcv_nxt += TCP_TCPLEN(cseg);
-          LWIP_ASSERT("tcp_receive: ooseq tcplen > rcv_wnd\n",
+          LWIP_ASSERT("tcp_receive: ooseq tcplen > rcv_wnd",
                       pcb->rcv_wnd >= TCP_TCPLEN(cseg));
           pcb->rcv_wnd -= TCP_TCPLEN(cseg);
 
@@ -1787,7 +1787,7 @@ tcp_receive(struct tcp_pcb *pcb)
                     next->next->len = (u16_t)(pcb->rcv_nxt + pcb->rcv_wnd - seqno);
                     pbuf_realloc(next->next->p, next->next->len);
                     tcplen = TCP_TCPLEN(next->next);
-                    LWIP_ASSERT("tcp_receive: segment not trimmed correctly to rcv_wnd\n",
+                    LWIP_ASSERT("tcp_receive: segment not trimmed correctly to rcv_wnd",
                                 (seqno + tcplen) == (pcb->rcv_nxt + pcb->rcv_wnd));
                   }
                 }
diff --git a/src/core/udp.c b/src/core/udp.c
index 96796884..dbc88ee7 100644
--- a/src/core/udp.c
+++ b/src/core/udp.c
@@ -365,7 +365,7 @@ udp_input(struct pbuf *p, struct netif *inp)
 #endif /* CHECKSUM_CHECK_UDP */
     if (pbuf_remove_header(p, UDP_HLEN)) {
       /* Can we cope with this failing? Just assert for now */
-      LWIP_ASSERT("pbuf_remove_header failed\n", 0);
+      LWIP_ASSERT("pbuf_remove_header failed", 0);
       UDP_STATS_INC(udp.drop);
       MIB2_STATS_INC(mib2.udpinerrors);
       pbuf_free(p);
diff --git a/src/include/lwip/priv/tcp_priv.h b/src/include/lwip/priv/tcp_priv.h
index c84b5be8..e9fbfd93 100644
--- a/src/include/lwip/priv/tcp_priv.h
+++ b/src/include/lwip/priv/tcp_priv.h
@@ -358,7 +358,7 @@ extern struct tcp_pcb ** const tcp_pcb_lists[NUM_TCP_PCB_LISTS];
                             for (tcp_tmp_pcb = *(pcbs); \
           tcp_tmp_pcb != NULL; \
         tcp_tmp_pcb = tcp_tmp_pcb->next) { \
-                                LWIP_ASSERT("TCP_REG: already registered\n", tcp_tmp_pcb != (npcb)); \
+                                LWIP_ASSERT("TCP_REG: already registered", tcp_tmp_pcb != (npcb)); \
                             } \
                             LWIP_ASSERT("TCP_REG: pcb->state != CLOSED", ((pcbs) == &tcp_bound_pcbs) || ((npcb)->state != CLOSED)); \
                             (npcb)->next = *(pcbs); \
diff --git a/src/netif/ppp/pppos.c b/src/netif/ppp/pppos.c
index dff02554..7992388e 100644
--- a/src/netif/ppp/pppos.c
+++ b/src/netif/ppp/pppos.c
@@ -719,7 +719,7 @@ static void pppos_input_callback(void *arg) {
 
   ppp = ((struct pppos_input_header*)pb->payload)->ppp;
   if(pbuf_remove_header(pb, sizeof(struct pppos_input_header))) {
-    LWIP_ASSERT("pbuf_remove_header failed\n", 0);
+    LWIP_ASSERT("pbuf_remove_header failed", 0);
     goto drop;
   }
 
diff --git a/src/netif/ppp/vj.c b/src/netif/ppp/vj.c
index b322ee4a..11df6f9c 100644
--- a/src/netif/ppp/vj.c
+++ b/src/netif/ppp/vj.c
@@ -409,7 +409,7 @@ vj_compress_tcp(struct vjcompress *comp, struct pbuf **pb)
     hlen -= deltaS + 4;
     if (pbuf_remove_header(np, hlen)){
       /* Can we cope with this failing?  Just assert for now */
-      LWIP_ASSERT("pbuf_remove_header failed\n", 0);
+      LWIP_ASSERT("pbuf_remove_header failed", 0);
     }
     cp = (u8_t*)np->payload;
     *cp++ = (u8_t)(changes | NEW_C);
@@ -418,7 +418,7 @@ vj_compress_tcp(struct vjcompress *comp, struct pbuf **pb)
     hlen -= deltaS + 3;
     if (pbuf_remove_header(np, hlen)) {
       /* Can we cope with this failing?  Just assert for now */
-      LWIP_ASSERT("pbuf_remove_header failed\n", 0);
+      LWIP_ASSERT("pbuf_remove_header failed", 0);
     }
     cp = (u8_t*)np->payload;
     *cp++ = (u8_t)changes;
@@ -621,7 +621,7 @@ vj_uncompress_tcp(struct pbuf **nb, struct vjcompress *comp)
   /* Remove the compressed header and prepend the uncompressed header. */
   if (pbuf_remove_header(n0, vjlen)) {
     /* Can we cope with this failing?  Just assert for now */
-    LWIP_ASSERT("pbuf_remove_header failed\n", 0);
+    LWIP_ASSERT("pbuf_remove_header failed", 0);
     goto bad;
   }
 
@@ -644,7 +644,7 @@ vj_uncompress_tcp(struct pbuf **nb, struct vjcompress *comp)
 
     if (pbuf_remove_header(np, cs->cs_hlen)) {
       /* Can we cope with this failing?  Just assert for now */
-      LWIP_ASSERT("pbuf_remove_header failed\n", 0);
+      LWIP_ASSERT("pbuf_remove_header failed", 0);
       goto bad;
     }