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-rw-r--r--src/devices/bus/rs232/rs232.h2
1 files changed, 2 insertions, 0 deletions
diff --git a/src/devices/bus/rs232/rs232.h b/src/devices/bus/rs232/rs232.h
index 56c8ec7b896..c4db0af2313 100644
--- a/src/devices/bus/rs232/rs232.h
+++ b/src/devices/bus/rs232/rs232.h
@@ -5,6 +5,8 @@
#pragma once
+#include "diserial.h"
+
#define MCFG_RS232_RXD_HANDLER(_devcb) \
devcb = &downcast<rs232_port_device &>(*device).set_rxd_handler(DEVCB_##_devcb);