diff --git a/bmlutils/bmlutils.c b/bmlutils/bmlutils.c
index 2f152c4..9f8ee2f 100644
--- a/bmlutils/bmlutils.c
+++ b/bmlutils/bmlutils.c
@@ -72,7 +72,7 @@ int cmd_bml_restore_raw_partition(const char *partition, const char *filename)
     return ret;
 }
 
-int cmd_bml_backup_raw_partition(const char *partition, const char *filename)
+int cmd_bml_backup_raw_partition(const char *partition, const char *out_file)
 {
     char* bml;
     if (strcmp("boot", partition) == 0)