diff --git a/common/cmd_vfd.c b/common/cmd_vfd.c
index 9c5b038..1429d31 100644
--- a/common/cmd_vfd.c
+++ b/common/cmd_vfd.c
@@ -45,7 +45,7 @@
 
 int trab_vfd (ulong bitmap);
 
-int do_vfd (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
+int do_vfd (cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
 {
 	ulong bitmap;