diff --git a/common/main.c b/common/main.c
index 3760ba3..20090ee 100644
--- a/common/main.c
+++ b/common/main.c
@@ -51,10 +51,10 @@
 void show_boot_progress (int val) __attribute__((weak, alias("__show_boot_progress")));
 
 #if defined(CONFIG_BOOT_RETRY_TIME) && defined(CONFIG_RESET_TO_RETRY)
-extern int do_reset (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[]);		/* for do_reset() prototype */
+extern int do_reset (cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[]);		/* for do_reset() prototype */
 #endif
 
-extern int do_bootd (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[]);
+extern int do_bootd (cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[]);
 
 #if defined(CONFIG_UPDATE_TFTP)
 void update_tftp (void);
@@ -1414,7 +1414,7 @@
 /****************************************************************************/
 
 #if defined(CONFIG_CMD_RUN)
-int do_run (cmd_tbl_t * cmdtp, int flag, int argc, char *argv[])
+int do_run (cmd_tbl_t * cmdtp, int flag, int argc, char * const argv[])
 {
 	int i;