1 files changed, 1 insertions, 0 deletions

diff --git a/drivers/mtd/chips/map_rom.c b/drivers/mtd/chips/map_rom.c
index bc6ee9ef8a3..1b328b1378f 100644
--- a/drivers/mtd/chips/map_rom.c
+++ b/drivers/mtd/chips/map_rom.c
@@ -47,6 +47,7 @@ static struct mtd_info *map_rom_probe(struct map_info *map)
         mtd->sync = maprom_nop;
         mtd->flags = MTD_CAP_ROM;
         mtd->erasesize = map->size;
+        mtd->writesize = 1;
 
         __module_get(THIS_MODULE);
         return mtd;