diff --git a/arch/arm/mach-shmobile/board-ap4evb.c b/arch/arm/mach-shmobile/board-ap4evb.c
index 32d9e2816e5..63c2fcac8e1 100644
--- a/arch/arm/mach-shmobile/board-ap4evb.c
+++ b/arch/arm/mach-shmobile/board-ap4evb.c
@@ -163,11 +163,13 @@ static struct mtd_partition nor_flash_partitions[] = {
 		.name		= "loader",
 		.offset		= 0x00000000,
 		.size		= 512 * 1024,
+		.mask_flags	= MTD_WRITEABLE,
 	},
 	{
 		.name		= "bootenv",
 		.offset		= MTDPART_OFS_APPEND,
 		.size		= 512 * 1024,
+		.mask_flags	= MTD_WRITEABLE,
 	},
 	{
 		.name		= "kernel_ro",