-int bus_match_add(struct bus_match_node *root, const char *match, sd_message_handler_t callback, void *userdata, struct bus_match_node **ret);
-int bus_match_remove(struct bus_match_node *root, const char *match, sd_message_handler_t callback, void *userdata);
+int bus_match_add(struct bus_match_node *root, const char *match, sd_bus_message_handler_t callback, void *userdata, struct bus_match_node **ret);
+int bus_match_remove(struct bus_match_node *root, const char *match, sd_bus_message_handler_t callback, void *userdata);