diff --git a/common/cmd_source.c b/common/cmd_source.c
index 1424d30..16a627a 100644
--- a/common/cmd_source.c
+++ b/common/cmd_source.c
@@ -199,7 +199,7 @@
 /**************************************************/
 #if defined(CONFIG_CMD_SOURCE)
 int
-do_source (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[])
+do_source (cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[])
 {
 	ulong addr;
 	int rcode;