diff --git a/drivers/net/s2io.c b/drivers/net/s2io.c
index f2ba944..67e0a65 100644
--- a/drivers/net/s2io.c
+++ b/drivers/net/s2io.c
@@ -335,10 +335,9 @@
 	{"mc_err_cnt"}
 };
 
-#define S2IO_XENA_STAT_LEN sizeof(ethtool_xena_stats_keys)/ ETH_GSTRING_LEN
-#define S2IO_ENHANCED_STAT_LEN sizeof(ethtool_enhanced_stats_keys)/ \
-					ETH_GSTRING_LEN
-#define S2IO_DRIVER_STAT_LEN sizeof(ethtool_driver_stats_keys)/ ETH_GSTRING_LEN
+#define S2IO_XENA_STAT_LEN	ARRAY_SIZE(ethtool_xena_stats_keys)
+#define S2IO_ENHANCED_STAT_LEN	ARRAY_SIZE(ethtool_enhanced_stats_keys)
+#define S2IO_DRIVER_STAT_LEN	ARRAY_SIZE(ethtool_driver_stats_keys)
 
 #define XFRAME_I_STAT_LEN (S2IO_XENA_STAT_LEN + S2IO_DRIVER_STAT_LEN )
 #define XFRAME_II_STAT_LEN (XFRAME_I_STAT_LEN + S2IO_ENHANCED_STAT_LEN )
@@ -346,7 +345,7 @@
 #define XFRAME_I_STAT_STRINGS_LEN ( XFRAME_I_STAT_LEN * ETH_GSTRING_LEN )
 #define XFRAME_II_STAT_STRINGS_LEN ( XFRAME_II_STAT_LEN * ETH_GSTRING_LEN )
 
-#define S2IO_TEST_LEN	sizeof(s2io_gstrings) / ETH_GSTRING_LEN
+#define S2IO_TEST_LEN	ARRAY_SIZE(s2io_gstrings)
 #define S2IO_STRINGS_LEN	S2IO_TEST_LEN * ETH_GSTRING_LEN
 
 #define S2IO_TIMER_CONF(timer, handle, arg, exp)		\