diff --git a/src/emu/cpu/m6800/m6800.c b/src/emu/cpu/m6800/m6800.c
index 437973c22ac..c68c3471628 100644
--- a/src/emu/cpu/m6800/m6800.c
+++ b/src/emu/cpu/m6800/m6800.c
@@ -1171,6 +1171,7 @@ void m6800_cpu_device::device_reset()
 	OCD = 0xffff;
 	TOD = 0xffff;
 	m_ram_ctrl |= 0x40;
+	m_latch09 = 0;
 
 	m_trcsr = M6800_TRCSR_TDRE;