diff --git a/src/mess/machine/c64_swiftlink.c b/src/mess/machine/c64_swiftlink.c
index de64c3e2a91..94769ec6bdf 100644
--- a/src/mess/machine/c64_swiftlink.c
+++ b/src/mess/machine/c64_swiftlink.c
@@ -38,6 +38,8 @@ const device_type C64_SWIFTLINK = &device_creator<c64_swiftlink_cartridge_device
 //-------------------------------------------------
 
 static SLOT_INTERFACE_START( rs232_devices )
+	SLOT_INTERFACE("serial_terminal", SERIAL_TERMINAL)
+	SLOT_INTERFACE("null_modem", NULL_MODEM)
 SLOT_INTERFACE_END
 
 static const rs232_port_interface rs232_intf =
diff --git a/src/mess/machine/c64_swiftlink.h b/src/mess/machine/c64_swiftlink.h
index a496594ffcb..1f2ce6e2e69 100644
--- a/src/mess/machine/c64_swiftlink.h
+++ b/src/mess/machine/c64_swiftlink.h
@@ -16,7 +16,10 @@
 #include "emu.h"
 #include "machine/c64exp.h"
 #include "machine/mos6551.h"
+#include "machine/null_modem.h"
 #include "machine/serial.h"
+#include "machine/terminal.h"
+
 
 
 
@@ -27,7 +30,7 @@
 // ======================> c64_swiftlink_cartridge_device
 
 class c64_swiftlink_cartridge_device : public device_t,
-									public device_c64_expansion_card_interface
+										public device_c64_expansion_card_interface
 {
 public:
 	// construction/destruction
diff --git a/src/mess/machine/c64_turbo232.c b/src/mess/machine/c64_turbo232.c
index 917323883e3..1bc5f5e00b5 100644
--- a/src/mess/machine/c64_turbo232.c
+++ b/src/mess/machine/c64_turbo232.c
@@ -38,6 +38,8 @@ const device_type C64_TURBO232 = &device_creator<c64_turbo232_cartridge_device>;
 //-------------------------------------------------
 
 static SLOT_INTERFACE_START( rs232_devices )
+	SLOT_INTERFACE("serial_terminal", SERIAL_TERMINAL)
+	SLOT_INTERFACE("null_modem", NULL_MODEM)
 SLOT_INTERFACE_END
 
 static const rs232_port_interface rs232_intf =
diff --git a/src/mess/machine/c64_turbo232.h b/src/mess/machine/c64_turbo232.h
index f308afc69e8..b0147cef4f1 100644
--- a/src/mess/machine/c64_turbo232.h
+++ b/src/mess/machine/c64_turbo232.h
@@ -16,7 +16,9 @@
 #include "emu.h"
 #include "machine/c64exp.h"
 #include "machine/mos6551.h"
+#include "machine/null_modem.h"
 #include "machine/serial.h"
+#include "machine/terminal.h"
 
 
 
@@ -27,7 +29,7 @@
 // ======================> c64_turbo232_cartridge_device
 
 class c64_turbo232_cartridge_device : public device_t,
-									public device_c64_expansion_card_interface
+										public device_c64_expansion_card_interface
 {
 public:
 	// construction/destruction