diff --git a/drivers/net/mv643xx_eth.c b/drivers/net/mv643xx_eth.c
index 771139e283af..d65cadef4d22 100644
--- a/drivers/net/mv643xx_eth.c
+++ b/drivers/net/mv643xx_eth.c
@@ -3156,7 +3156,7 @@ struct mv643xx_stats {
 	int stat_offset;
 };
 
-#define MV643XX_STAT(m) sizeof(((struct mv643xx_private *)0)->m), \
+#define MV643XX_STAT(m) FIELD_SIZEOF(struct mv643xx_private, m), \
 					offsetof(struct mv643xx_private, m)
 
 static const struct mv643xx_stats mv643xx_gstrings_stats[] = {