diff --git a/include/linux/mtd/mtd.h b/include/linux/mtd/mtd.h
index cd0be91bdefa55f568253904c7d374751fffac52..035d641e8847cea56cf39f34a92296feffefe5ae 100644
--- a/include/linux/mtd/mtd.h
+++ b/include/linux/mtd/mtd.h
@@ -386,7 +386,7 @@ static inline struct device_node *mtd_get_of_node(struct mtd_info *mtd)
 	return dev_of_node(&mtd->dev);
 }
 
-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;
 }