diff --git a/src/mess/drivers/timex.c b/src/mess/drivers/timex.c
index 95ed7f8b729..2221048011e 100644
--- a/src/mess/drivers/timex.c
+++ b/src/mess/drivers/timex.c
@@ -683,6 +683,8 @@ static MACHINE_CONFIG_DERIVED( ts2068, spectrum_128 )
 	MCFG_CPU_REPLACE("maincpu", Z80, XTAL_14_112MHz/4)        /* From Schematic; 3.528 MHz */
 	MCFG_CPU_PROGRAM_MAP(ts2068_mem)
 	MCFG_CPU_IO_MAP(ts2068_io)
+	MCFG_CPU_VBLANK_INT_DRIVER("screen", spectrum_state,  spec_interrupt)
+	MCFG_QUANTUM_TIME(attotime::from_hz(60))
 
 	MCFG_MACHINE_RESET_OVERRIDE(spectrum_state, ts2068 )