diff --git a/src/netif/etharp.c b/src/netif/etharp.c
index 876018fe..a979b737 100644
--- a/src/netif/etharp.c
+++ b/src/netif/etharp.c
@@ -1278,7 +1278,9 @@ ethernet_input(struct pbuf *p, struct netif *netif)
 {
   struct eth_hdr* ethhdr;
   u16_t type;
+#if LWIP_ARP || ETHARP_SUPPORT_VLAN
   s16_t ip_hdr_offset = SIZEOF_ETH_HDR;
+#endif /* LWIP_ARP || ETHARP_SUPPORT_VLAN */
 
   if (p->len <= SIZEOF_ETH_HDR) {
     /* a packet with only an ethernet header (or less) is not valid for us */