diff --git a/drivers/mtd/mtdpart.c b/drivers/mtd/mtdpart.c
index bf1ab56..f018373 100644
--- a/drivers/mtd/mtdpart.c
+++ b/drivers/mtd/mtdpart.c
@@ -152,8 +152,7 @@
 		size_t len, size_t *retlen, u_char *buf)
 {
 	struct mtd_part *part = PART(mtd);
-	return part->master->read_user_prot_reg(part->master, from,
-					len, retlen, buf);
+	return mtd_read_user_prot_reg(part->master, from, len, retlen, buf);
 }
 
 static int part_get_user_prot_info(struct mtd_info *mtd,