diff --git a/uip/uip_arp.c b/uip/uip_arp.c
index 8c9b2a8..362b1b8 100644
--- a/uip/uip_arp.c
+++ b/uip/uip_arp.c
@@ -238,9 +238,8 @@ uip_arp_update(__xdata u16_t *ipaddr, __xdata struct uip_eth_addr *ethaddr)
  * variable uip_len.
  */
 /*-----------------------------------------------------------------------------------*/
-#if 0
 void
-uip_arp_ipin(void)
+uip_arp_ipin(void) __banked
 {
   uip_len -= sizeof(struct uip_eth_hdr);
 	
@@ -258,7 +257,7 @@ uip_arp_ipin(void)
   
   return;
 }
-#endif /* 0 */
+
 /*-----------------------------------------------------------------------------------*/
 /**
  * ARP processing for incoming ARP packets.
diff --git a/uip/uip_arp.h b/uip/uip_arp.h
index 833d7c2..e274584 100644
--- a/uip/uip_arp.h
+++ b/uip/uip_arp.h
@@ -78,8 +78,8 @@ void uip_arp_init(void) __banked;
    inserts a new mapping if none exists. The function assumes that an
    IP packet with an Ethernet header is present in the uip_buf buffer
    and that the length of the packet is in the uip_len variable. */
-/*void uip_arp_ipin(void);*/
-#define uip_arp_ipin()
+void uip_arp_ipin(void) __banked;
+// #define uip_arp_ipin()
 
 /* The uip_arp_arpin() should be called when an ARP packet is received
    by the Ethernet driver. This function also assumes that the