diff --git a/drivers/mtd/mtdpart.c b/drivers/mtd/mtdpart.c
index d518e4db8a0b..85005846f30d 100644
--- a/drivers/mtd/mtdpart.c
+++ b/drivers/mtd/mtdpart.c
@@ -744,7 +744,7 @@ int parse_mtd_partitions(struct mtd_info *master, const char **types,
 	return ret;
 }
 
-int mtd_is_partition(struct mtd_info *mtd)
+int mtd_is_partition(const struct mtd_info *mtd)
 {
 	struct mtd_part *part;
 	int ispart = 0;
diff --git a/include/linux/mtd/partitions.h b/include/linux/mtd/partitions.h
index 2475228c1158..02a51157a173 100644
--- a/include/linux/mtd/partitions.h
+++ b/include/linux/mtd/partitions.h
@@ -79,7 +79,7 @@ struct mtd_part_parser {
 extern int register_mtd_parser(struct mtd_part_parser *parser);
 extern int deregister_mtd_parser(struct mtd_part_parser *parser);
 
-int mtd_is_partition(struct mtd_info *mtd);
+int mtd_is_partition(const struct mtd_info *mtd);
 int mtd_add_partition(struct mtd_info *master, char *name,
 		      long long offset, long long length);
 int mtd_del_partition(struct mtd_info *master, int partno);