diff --git a/spa/plugins/bluez5/defs.h b/spa/plugins/bluez5/defs.h
index 2688c0426..e5c911812 100644
--- a/spa/plugins/bluez5/defs.h
+++ b/spa/plugins/bluez5/defs.h
@@ -463,7 +463,7 @@ int spa_bt_device_report_battery_level(struct spa_bt_device *device, uint8_t per
 
 struct spa_bt_sco_io;
 
-struct spa_bt_sco_io *spa_bt_sco_io_create(struct spa_loop *data_loop, int fd, uint16_t write_mtu, uint16_t read_mtu);
+struct spa_bt_sco_io *spa_bt_sco_io_create(struct spa_loop *data_loop, int fd, uint16_t read_mtu, uint16_t write_mtu);
 void spa_bt_sco_io_destroy(struct spa_bt_sco_io *io);
 void spa_bt_sco_io_set_source_cb(struct spa_bt_sco_io *io, int (*source_cb)(void *userdata, uint8_t *data, int size), void *userdata);
 void spa_bt_sco_io_set_sink_cb(struct spa_bt_sco_io *io, int (*sink_cb)(void *userdata), void *userdata);