diff --git a/src/emu/cpu/sc61860/sc61860.c b/src/emu/cpu/sc61860/sc61860.c
index faf440a7a9a..5f9b34b6b91 100644
--- a/src/emu/cpu/sc61860/sc61860.c
+++ b/src/emu/cpu/sc61860/sc61860.c
@@ -135,6 +135,8 @@ void sc61860_device::device_start()
 	m_dp = 0;
 	m_carry = 0;
 	m_zero = 0;
+	m_pc = 0;
+	m_debugger_temp = 0;
 	memset( m_ram, 0, sizeof(m_ram) );
 
 	save_item(NAME(m_p));