diff --git a/common/command.c b/common/command.c
index 03c70834d..d9cc4a6d4 100644
--- a/common/command.c
+++ b/common/command.c
@@ -104,7 +104,7 @@ int register_command(struct command *cmd)
 	list_add_sort(&cmd->list, &command_list, compare);
 
 	if (cmd->aliases) {
-		char **aliases = (char**)cmd->aliases;
+		const char * const *aliases = cmd->aliases;
 		while(*aliases) {
 			struct command *c = xzalloc(sizeof(struct command));
 
diff --git a/include/command.h b/include/command.h
index 43ee454f2..0afc5c755 100644
--- a/include/command.h
+++ b/include/command.h
@@ -40,7 +40,7 @@ struct string_list;
  */
 struct command {
 	const char	*name;		/* Command Name			*/
-	const char	**aliases;
+	const char	* const *aliases;
 					/* Implementation function	*/
 	int		(*cmd)(int, char *[]);
 	int		(*complete)(struct string_list *sl, char *instr);