diff --git a/include/linux/mtd/mtd.h b/include/linux/mtd/mtd.h
index cd1f557a2f3151834f8a8211804c0623402cc78e..e3549f0a46117cef281f841c4c4e90a99d384731 100644
--- a/include/linux/mtd/mtd.h
+++ b/include/linux/mtd/mtd.h
@@ -392,7 +392,7 @@ static inline void mtd_set_ooblayout(struct mtd_info *mtd,
 	mtd->ooblayout = ooblayout;
 }
 
-static inline int mtd_oobavail(struct mtd_info *mtd, struct mtd_oob_ops *ops)
+static inline u32 mtd_oobavail(struct mtd_info *mtd, struct mtd_oob_ops *ops)
 {
 	return ops->mode == MTD_OPS_AUTO_OOB ? mtd->oobavail : mtd->oobsize;
 }