diff --git a/include/proto/arg.h b/include/proto/arg.h
index 8e0a81b..78c1105 100644
--- a/include/proto/arg.h
+++ b/include/proto/arg.h
@@ -59,8 +59,11 @@
  */
 extern struct arg empty_arg_list[8];
 
+struct arg_list *arg_list_clone(const struct arg_list *orig);
+struct arg_list *arg_list_add(struct arg_list *orig, struct arg *arg, int pos);
 int make_arg_list(const char *in, int len, unsigned int mask, struct arg **argp,
-		  char **err_msg, const char **err_ptr, int *err_arg);
+                  char **err_msg, const char **err_ptr, int *err_arg,
+                  struct arg_list *al);
 
 #endif /* _PROTO_ARG_H */