diff --git a/src/mame/drivers/mc1000.cpp b/src/mame/drivers/mc1000.cpp
index 06c1b177c15..c98f66b601e 100644
--- a/src/mame/drivers/mc1000.cpp
+++ b/src/mame/drivers/mc1000.cpp
@@ -453,6 +453,7 @@ static MACHINE_CONFIG_START( mc1000, mc1000_state )
 	/* devices */
 	MCFG_CASSETTE_ADD("cassette")
 	MCFG_CASSETTE_DEFAULT_STATE(CASSETTE_STOPPED | CASSETTE_MOTOR_ENABLED | CASSETTE_SPEAKER_ENABLED)
+	MCFG_CASSETTE_INTERFACE("mc1000_cass")
 
 	MCFG_SOFTWARE_LIST_ADD("cass_list", "mc1000_cass")