diff --git a/src/devices/bus/nscsi/devices.cpp b/src/devices/bus/nscsi/devices.cpp
index 5013bb12795..6702493313a 100644
--- a/src/devices/bus/nscsi/devices.cpp
+++ b/src/devices/bus/nscsi/devices.cpp
@@ -1,6 +1,8 @@
 // license:BSD-3-Clause
 // copyright-holders:AJR
 
+#include "emu.h"
+
 #include "bus/nscsi/cd.h"
 #include "bus/nscsi/cw7501.h"
 #include "bus/nscsi/hd.h"