diff --git a/src/include/86box/sio.h b/src/include/86box/sio.h
index cc8db7924..b0ddb1ec7 100644
--- a/src/include/86box/sio.h
+++ b/src/include/86box/sio.h
@@ -63,6 +63,7 @@ extern const device_t	um8669f_device;
 extern const device_t	via_vt82c686_sio_device;
 extern const device_t	w83787f_device;
 extern const device_t	w83787f_ide_device;
+extern const device_t	w83787f_ide_sec_device;
 extern const device_t	w83877f_device;
 extern const device_t	w83877f_president_device;
 extern const device_t	w83877tf_device;