diff --git a/board/sandburst/metrobox/metrobox.c b/board/sandburst/metrobox/metrobox.c
index 0c8e6df..76d8293 100644
--- a/board/sandburst/metrobox/metrobox.c
+++ b/board/sandburst/metrobox/metrobox.c
@@ -485,7 +485,7 @@
 	return;
 }
 
-int metroboxSetupVars(cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
+int metroboxSetupVars(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
 {
 	unsigned short sernum;
 	char envstr[255];
@@ -545,7 +545,7 @@
 	return(1);
 }
 
-int metroboxRecover(cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
+int metroboxRecover(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
 {
 	unsigned short sernum;
 	char envstr[255];