diff --git a/src/core/ipv4/etharp.c b/src/core/ipv4/etharp.c
index b599bcc2..9742d900 100644
--- a/src/core/ipv4/etharp.c
+++ b/src/core/ipv4/etharp.c
@@ -456,7 +456,7 @@ etharp_update_arp_entry(struct netif *netif, const ip4_addr_t *ipaddr, struct et
 
   LWIP_DEBUGF(ETHARP_DEBUG | LWIP_DBG_TRACE, ("etharp_update_arp_entry: updating stable entry %"S16_F"\n", (s16_t)i));
   /* update address */
-  ETHADDR32_COPY(&arp_table[i].ethaddr, ethaddr);
+  ETHADDR16_COPY(&arp_table[i].ethaddr, ethaddr);
   /* reset time stamp */
   arp_table[i].ctime = 0;
   /* this is where we will send out queued packets! */
diff --git a/src/include/lwip/prot/ethernet.h b/src/include/lwip/prot/ethernet.h
index e4baa29d..b7a967f0 100644
--- a/src/include/lwip/prot/ethernet.h
+++ b/src/include/lwip/prot/ethernet.h
@@ -149,12 +149,6 @@ enum eth_type {
 #define LL_IP6_MULTICAST_ADDR_0 0x33
 #define LL_IP6_MULTICAST_ADDR_1 0x33
 
-/** MEMCPY-like macro to copy to/from struct eth_addr's that are local variables
- * or known to be 32-bit aligned within the protocol header. */
-#ifndef ETHADDR32_COPY
-#define ETHADDR32_COPY(dst, src)  SMEMCPY(dst, src, ETH_HWADDR_LEN)
-#endif
-
 /** MEMCPY-like macro to copy to/from struct eth_addr's that are no local
  * variables and known to be 16-bit aligned within the protocol header. */
 #ifndef ETHADDR16_COPY
diff --git a/src/netif/ethernet.c b/src/netif/ethernet.c
index 9b76e85f..d2924fb1 100644
--- a/src/netif/ethernet.c
+++ b/src/netif/ethernet.c
@@ -289,7 +289,7 @@ ethernet_output(struct netif* netif, struct pbuf* p,
 
   ethhdr = (struct eth_hdr*)p->payload;
   ethhdr->type = eth_type_be;
-  ETHADDR32_COPY(&ethhdr->dest, dst);
+  ETHADDR16_COPY(&ethhdr->dest, dst);
   ETHADDR16_COPY(&ethhdr->src,  src);
 
   LWIP_ASSERT("netif->hwaddr_len must be 6 for ethernet_output!",