diff --git a/src/devices/machine/mm58174.cpp b/src/devices/machine/mm58174.cpp
index fe24c8091b5..53d23bdc4e3 100644
--- a/src/devices/machine/mm58174.cpp
+++ b/src/devices/machine/mm58174.cpp
@@ -35,8 +35,11 @@ DEFINE_DEVICE_TYPE(MM58174, mm58174_device, "mm58174", "National Semiconductor M
 
 
 mm58174_device::mm58174_device(const machine_config &mconfig, const char *tag, device_t *owner, uint32_t clock)
-	: device_t(mconfig, MM58174, tag, owner, clock),
-		device_rtc_interface(mconfig, *this)
+	: device_t(mconfig, MM58174, tag, owner, clock)
+	, device_rtc_interface(mconfig, *this)
+	, m_control(0)
+	, m_int_ctl(0)
+	, m_tenths(0)
 {
 }
 
@@ -68,16 +71,6 @@ void mm58174_device::device_start()
 	save_item(NAME(m_tenths));
 }
 
-//-------------------------------------------------
-//  device_reset - device-specific reset
-//-------------------------------------------------
-
-void mm58174_device::device_reset()
-{
-	m_tenths = 0;
-	m_control = 0;
-}
-
 //-------------------------------------------------
 //  rtc_clock_updated -
 //-------------------------------------------------
@@ -103,7 +96,7 @@ attotime mm58174_device::interrupt_period_table(int val)
 {
 	switch(val)
 	{
-		case 0: return attotime::from_msec(0);
+		case 0: return attotime::never;
 		case 1: return attotime::from_msec(500);
 		case 2: return attotime::from_seconds(5);
 		case 4: return attotime::from_seconds(60);
diff --git a/src/devices/machine/mm58174.h b/src/devices/machine/mm58174.h
index 5d755627084..7d592e258b8 100644
--- a/src/devices/machine/mm58174.h
+++ b/src/devices/machine/mm58174.h
@@ -23,7 +23,6 @@ public:
 protected:
 	// device-level overrides
 	virtual void device_start() override;
-	virtual void device_reset() override;
 	virtual void device_timer(emu_timer &timer, device_timer_id id, int param, void *ptr) override;
 
 	// device_rtc_interface overrides