--- a/drivers/net/cpmac.c
+++ b/drivers/net/cpmac.c
@@ -56,7 +56,7 @@ MODULE_PARM_DESC(dumb_switch, "Assume sw
 
 #define CPMAC_VERSION "0.5.1"
 /* frame size + 802.1q tag */
-#define CPMAC_SKB_SIZE		(ETH_FRAME_LEN + 4)
+#define CPMAC_SKB_SIZE		(ETH_FRAME_LEN + ETH_FCS_LEN + 4)
 #define CPMAC_QUEUES	8
 
 /* Ethernet registers */
