diff --git a/src/emu/sound/ay8910.c b/src/emu/sound/ay8910.c
index 27b654532d9..627e227d8fd 100644
--- a/src/emu/sound/ay8910.c
+++ b/src/emu/sound/ay8910.c
@@ -975,7 +975,7 @@ ay8910_device::ay8910_device(const machine_config &mconfig, const char *tag, dev
 		m_rng(0),
 		m_env_step_mask(0x0f),
 		m_step(2),
-		m_zero_is_off(0),
+		m_zero_is_off(1),
 		m_par(&ay8910_param),
 		m_par_env(&ay8910_param),
 		m_flags(AY8910_LEGACY_OUTPUT),