diff --git a/drivers/mtd/nand/nand-bb.c b/drivers/mtd/nand/nand-bb.c
index 0292f2f..f387ef6 100644
--- a/drivers/mtd/nand/nand-bb.c
+++ b/drivers/mtd/nand/nand-bb.c
@@ -261,7 +261,7 @@
  * @param[in] name Partition name (can be obtained with devinfo command)
  * @return The device representing the new partition.
  */
-int dev_add_bb_dev(char *path, const char *name)
+int dev_add_bb_dev(const char *path, const char *name)
 {
 	struct nand_bb *bb;
 	int ret = -ENOMEM;
diff --git a/include/nand.h b/include/nand.h
index b1762df..a0e77cc 100644
--- a/include/nand.h
+++ b/include/nand.h
@@ -5,10 +5,10 @@
 struct nand_bb;
 
 #ifdef CONFIG_NAND
-int dev_add_bb_dev(char *filename, const char *name);
+int dev_add_bb_dev(const char *filename, const char *name);
 int dev_remove_bb_dev(const char *name);
 #else
-static inline int dev_add_bb_dev(char *filename, const char *name) {
+static inline int dev_add_bb_dev(const char *filename, const char *name) {
 	return 0;
 }
 static inline int dev_remove_bb_dev(const char *name)