diff --git a/source/AY8910.cpp b/source/AY8910.cpp
index 602f165c..29f5a677 100644
--- a/source/AY8910.cpp
+++ b/source/AY8910.cpp
@@ -121,6 +121,7 @@ void AY8913::init(void)
 
 AY8913::AY8913(void)
 {
+	memset(sound_ay_registers, 0, sizeof(sound_ay_registers));
 	init();
 	m_fCurrentCLK_AY8910 = g_fCurrentCLK6502;
 };