diff --git a/src/machine/m_at.c b/src/machine/m_at.c
index 61f6f4752..dc47b6207 100644
--- a/src/machine/m_at.c
+++ b/src/machine/m_at.c
@@ -47,7 +47,6 @@
 #include <86box/dma.h>
 #include <86box/mem.h>
 #include <86box/device.h>
-#include <86box/serial.h>
 #include <86box/fdd.h>
 #include <86box/fdc.h>
 #include <86box/fdc_ext.h>
@@ -80,9 +79,6 @@ machine_at_common_init_ex(const machine_t *model, int type)
     else if (type == 0)
 	device_add(&at_nvr_device);
 
-	device_add_inst(&ns16450_device, 1);
-	device_add_inst(&ns16450_device, 2);
-
     standalone_gameport_type = &gameport_device;
 }