diff --git a/src/include/netif/etharp.h b/src/include/netif/etharp.h
index ae12726f..83a722f0 100644
--- a/src/include/netif/etharp.h
+++ b/src/include/netif/etharp.h
@@ -95,8 +95,8 @@ struct ethip_hdr {
 
 void etharp_init(void);
 void etharp_tmr(void);
-struct pbuf *etharp_ip_input(struct netif *netif, struct pbuf *p);
-struct pbuf *etharp_arp_input(struct netif *netif, struct eth_addr *ethaddr,
+void etharp_ip_input(struct netif *netif, struct pbuf *p);
+void etharp_arp_input(struct netif *netif, struct eth_addr *ethaddr,
          struct pbuf *p);
 struct pbuf *etharp_output(struct netif *netif, struct ip_addr *ipaddr,
          struct pbuf *q);
diff --git a/src/netif/etharp.c b/src/netif/etharp.c
index e6675c08..985d978d 100644
--- a/src/netif/etharp.c
+++ b/src/netif/etharp.c
@@ -356,7 +356,7 @@ update_arp_entry(struct netif *netif, struct ip_addr *ipaddr, struct eth_addr *e
  *
  * @see pbuf_free()
  */
-struct pbuf *
+void
 etharp_ip_input(struct netif *netif, struct pbuf *p)
 {
   struct ethip_hdr *hdr;
@@ -367,13 +367,12 @@ etharp_ip_input(struct netif *netif, struct pbuf *p)
   /* source is on local network? */
   if (!ip_addr_maskcmp(&(hdr->ip.src), &(netif->ip_addr), &(netif->netmask))) {
     /* do nothing */
-    return NULL;
+    return;
   }
 
   LWIP_DEBUGF(ETHARP_DEBUG | DBG_TRACE, ("etharp_ip_input: updating ETHARP table.\n"));
   /* update ARP table, ask to insert entry */
   update_arp_entry(netif, &(hdr->ip.src), &(hdr->eth.src), ARP_INSERT_FLAG);
-  return NULL;
 }
 
 
@@ -392,7 +391,7 @@ etharp_ip_input(struct netif *netif, struct pbuf *p)
  *
  * @see pbuf_free()
  */
-struct pbuf *
+void
 etharp_arp_input(struct netif *netif, struct eth_addr *ethaddr, struct pbuf *p)
 {
   struct etharp_hdr *hdr;
@@ -405,7 +404,7 @@ etharp_arp_input(struct netif *netif, struct eth_addr *ethaddr, struct pbuf *p)
   if (p->tot_len < sizeof(struct etharp_hdr)) {
     LWIP_DEBUGF(ETHARP_DEBUG | DBG_TRACE | 1, ("etharp_arp_input: packet dropped, too short (%d/%d)\n", p->tot_len, sizeof(struct etharp_hdr)));
     pbuf_free(p);
-    return NULL;
+    return;
   }
 
   hdr = p->payload;
@@ -492,9 +491,6 @@ etharp_arp_input(struct netif *netif, struct eth_addr *ethaddr, struct pbuf *p)
   }
   /* free ARP packet */
   pbuf_free(p);
-  p = NULL;
-  /* nothing to send, we did it! */
-  return NULL;
 }
 
 /**