diff --git a/drivers/mtd/ubi/build.c b/drivers/mtd/ubi/build.c
index 6c3fb5a..58a49e7 100644
--- a/drivers/mtd/ubi/build.c
+++ b/drivers/mtd/ubi/build.c
@@ -691,6 +691,8 @@ static int io_init(struct ubi_device *ubi)
        ubi_assert(ubi->min_io_size % ubi->hdrs_min_io_size == 0);
 
        ubi->max_write_size = ubi->mtd->writebufsize;
+       ubi->max_write_size = 256;
+
        /*
         * Maximum write size has to be greater or equivalent to min. I/O
         * size, and be multiple of min. I/O size.