diff --git a/src/devices/bus/a2bus/romcard.cpp b/src/devices/bus/a2bus/romcard.cpp
index 66137234077..dbbe26342b7 100644
--- a/src/devices/bus/a2bus/romcard.cpp
+++ b/src/devices/bus/a2bus/romcard.cpp
@@ -12,6 +12,7 @@
 
 *********************************************************************/
 
+#include "emu.h"
 #include "a2bus.h"
 #include "romcard.h"
 #include <errno.h>
diff --git a/src/devices/bus/a800/a5200_supercart.cpp b/src/devices/bus/a800/a5200_supercart.cpp
index 430bb7e7662..35db704533f 100644
--- a/src/devices/bus/a800/a5200_supercart.cpp
+++ b/src/devices/bus/a800/a5200_supercart.cpp
@@ -14,6 +14,7 @@ TODO:
 
 **************************************************************************************************/
 
+#include "emu.h"
 #include "a5200_supercart.h"
 
 DEFINE_DEVICE_TYPE(A5200_ROM_SUPERCART, a5200_rom_supercart_device, "a5200_supercart", "Atari 5200 Super Cart")
diff --git a/src/devices/bus/a800/a800_carts.cpp b/src/devices/bus/a800/a800_carts.cpp
index 5d7ad883bb4..a497da257d9 100644
--- a/src/devices/bus/a800/a800_carts.cpp
+++ b/src/devices/bus/a800/a800_carts.cpp
@@ -1,6 +1,7 @@
 // license:BSD-3-Clause
 // copyright-holders:Fabio Priuli, Angelo Salese
 
+#include "emu.h"
 #include "a800_carts.h"
 
 // (#num) denotes the canonical number from .car specs for unemulated/undumped variants
diff --git a/src/devices/bus/msx/cart/slotoptions.cpp b/src/devices/bus/msx/cart/slotoptions.cpp
index 208d3d4ade7..20a9e538402 100644
--- a/src/devices/bus/msx/cart/slotoptions.cpp
+++ b/src/devices/bus/msx/cart/slotoptions.cpp
@@ -1,5 +1,6 @@
 // license:BSD-3-Clause
 // copyright-holders:Wilbert Pol
+#include "emu.h"
 #include "slotoptions.h"
 
 namespace bus::msx::cart::slotoptions {