diff --git a/drivers/net/rckemac.c b/drivers/net/rckemac.c
index 1c8ae09d..2769b909 100644
--- a/drivers/net/rckemac.c
+++ b/drivers/net/rckemac.c
@@ -261,6 +261,7 @@ again:
 static void rckemacif_input(struct netif* netif, struct pbuf* p)
 {
 	struct eth_hdr *ethhdr;
+	err_t err;
  
 	/* points to packet payload, which starts with an Ethernet header */
 	ethhdr = p->payload;
@@ -275,8 +276,8 @@ static void rckemacif_input(struct netif* netif, struct pbuf* p)
 	case ETHTYPE_PPPOE:
 #endif /* PPPOE_SUPPORT */
 		/* full packet send to tcpip_thread to process */
-		if (mynetif->input(p, mynetif) != ERR_OK) {
-			LWIP_DEBUGF(NETIF_DEBUG, ("rckemacif_input: IP input error\n"));
+		if ((err = mynetif->input(p, mynetif)) != ERR_OK) {
+			LWIP_DEBUGF(NETIF_DEBUG, ("rckemacif_input: IP input error %u\n", err));
 			pbuf_free(p);
 		}
 		break;