diff --git a/drivers/mtd/nand/nand_bbt.c b/drivers/mtd/nand/nand_bbt.c
index 63a1a36a3f4b..b1d4f813aedc 100644
--- a/drivers/mtd/nand/nand_bbt.c
+++ b/drivers/mtd/nand/nand_bbt.c
@@ -1080,7 +1080,7 @@ static int nand_scan_bbt(struct mtd_info *mtd, struct nand_bbt_descr *bd)
 	struct nand_bbt_descr *td = this->bbt_td;
 	struct nand_bbt_descr *md = this->bbt_md;
 
-	len = mtd->size >> (this->bbt_erase_shift + 2);
+	len = (mtd->size >> (this->bbt_erase_shift + 2)) ? : 1;
 	/*
 	 * Allocate memory (2bit per block) and clear the memory bad block
 	 * table.