diff --git a/src/mess/machine/kb3600.c b/src/mess/machine/kb3600.c
index 984377c3a76..6f87fd3eb5d 100644
--- a/src/mess/machine/kb3600.c
+++ b/src/mess/machine/kb3600.c
@@ -110,6 +110,15 @@ void ay3600_device::device_start()
 }
 
 
+//-------------------------------------------------
+//  device_start - device-specific reset
+//-------------------------------------------------
+
+void ay3600_device::device_reset()
+{
+	m_ako = 0;
+}
+
 //-------------------------------------------------
 //  device_timer - handler timer events
 //-------------------------------------------------
diff --git a/src/mess/machine/kb3600.h b/src/mess/machine/kb3600.h
index 0fae4d78277..8d6dd8a25aa 100644
--- a/src/mess/machine/kb3600.h
+++ b/src/mess/machine/kb3600.h
@@ -116,6 +116,7 @@ public:
 protected:
 	// device-level overrides
 	virtual void device_start();
+	virtual void device_reset();
 	virtual void device_config_complete();
 	virtual void device_timer(emu_timer &timer, device_timer_id id, int param, void *ptr);