diff --git a/src/include/netif/etharp.h b/src/include/netif/etharp.h
index e745dcc3..9d9be2f7 100644
--- a/src/include/netif/etharp.h
+++ b/src/include/netif/etharp.h
@@ -116,6 +116,7 @@ err_t etharp_request(struct netif *netif, const ip4_addr_t *ipaddr);
  *  From RFC 3220 "IP Mobility Support for IPv4" section 4.6. */
 #define etharp_gratuitous(netif) etharp_request((netif), netif_ip4_addr(netif))
 void etharp_cleanup_netif(struct netif *netif);
+void etharp_ip_input(struct netif *netif, struct pbuf *p);
 
 #if ETHARP_SUPPORT_STATIC_ENTRIES
 err_t etharp_add_static_entry(const ip4_addr_t *ipaddr, struct eth_addr *ethaddr);
diff --git a/src/netif/etharp.c b/src/netif/etharp.c
index 776e949f..bf32b651 100644
--- a/src/netif/etharp.c
+++ b/src/netif/etharp.c
@@ -670,7 +670,7 @@ etharp_get_entry(u8_t i, ip4_addr_t **ipaddr, struct netif **netif, struct eth_a
  *
  * @see pbuf_free()
  */
-static void
+void
 etharp_ip_input(struct netif *netif, struct pbuf *p)
 {
   struct eth_hdr *ethhdr;