diff --git a/common/bbu.c b/common/bbu.c
index 5cb09e4..3271d40 100644
--- a/common/bbu.c
+++ b/common/bbu.c
@@ -361,7 +361,7 @@
  * Return: 0 if successful, negative error code otherwise
  */
 int bbu_register_std_file_update(const char *name, unsigned long flags,
-		char *devicefile, enum filetype imagetype)
+		const char *devicefile, enum filetype imagetype)
 {
 	struct bbu_std *std;
 	struct bbu_handler *handler;
diff --git a/include/bbu.h b/include/bbu.h
index 0ed355b..9da6785 100644
--- a/include/bbu.h
+++ b/include/bbu.h
@@ -54,7 +54,7 @@
 int bbu_register_handler(struct bbu_handler *);
 
 int bbu_register_std_file_update(const char *name, unsigned long flags,
-		char *devicefile, enum filetype imagetype);
+		const char *devicefile, enum filetype imagetype);
 
 #else
 
@@ -64,7 +64,7 @@
 }
 
 static inline int bbu_register_std_file_update(const char *name, unsigned long flags,
-		char *devicefile, enum filetype imagetype)
+		const char *devicefile, enum filetype imagetype)
 {
 	return -ENOSYS;
 }