diff --git a/drivers/mtd/mtdblock.c b/drivers/mtd/mtdblock.c
index 2aef5dd..53884cc 100644
--- a/drivers/mtd/mtdblock.c
+++ b/drivers/mtd/mtdblock.c
@@ -373,7 +373,7 @@
 
 static struct mtd_blktrans_ops mtdblock_tr = {
 	.name		= "mtdblock",
-	.major		= 31,
+	.major		= MTD_BLOCK_MAJOR,
 	.part_bits	= 0,
 	.blksize 	= 512,
 	.open		= mtdblock_open,
diff --git a/drivers/mtd/mtdblock_ro.c b/drivers/mtd/mtdblock_ro.c
index 92759a9..70d27b4 100644
--- a/drivers/mtd/mtdblock_ro.c
+++ b/drivers/mtd/mtdblock_ro.c
@@ -70,7 +70,7 @@
 
 static struct mtd_blktrans_ops mtdblock_tr = {
 	.name		= "mtdblock",
-	.major		= 31,
+	.major		= MTD_BLOCK_MAJOR,
 	.part_bits	= 0,
 	.blksize 	= 512,
 	.readsect	= mtdblock_readsect,