diff --git a/drivers/net/mmnif.c b/drivers/net/mmnif.c
index d8d471cc..c07db0b5 100644
--- a/drivers/net/mmnif.c
+++ b/drivers/net/mmnif.c
@@ -1063,9 +1063,14 @@ static void mmnif_rx(struct netif* netif)
 
 drop_packet:
 	/* packet is lost so gather stats and leave the rx handler*/
-	mmnif->rx_buff->pos++;
-	mmnif->rx_buff->queued--;
-	LINK_STATS_INC(link.drop);
+        mmnif_lock_rx_hdr(own_ip_address & 0xFF);
+
+        mmnif->rx_buff->pos++;
+        mmnif->rx_buff->queued--;
+
+        mmnif_unlock_rx_hdr(own_ip_address & 0xFF);
+
+        LINK_STATS_INC(link.drop);
 	mmnif->stats.rx_err++;
 	return;
 }