diff --git a/src/engine/platform/sound/ay8910.cpp b/src/engine/platform/sound/ay8910.cpp
index f36bbbb92..a9e1c8fb6 100644
--- a/src/engine/platform/sound/ay8910.cpp
+++ b/src/engine/platform/sound/ay8910.cpp
@@ -1421,7 +1421,6 @@ ay8910_device::ay8910_device(device_type type, unsigned int clock,
 	: chip_type(type),
     m_type(psg_type),
 		m_streams(streams),
-		m_ioports(ioports),
 		m_ready(0),
 		m_active(false),
 		m_register_latch(0),
diff --git a/src/engine/platform/sound/ay8910.h b/src/engine/platform/sound/ay8910.h
index 020081e5c..e3d4b3718 100644
--- a/src/engine/platform/sound/ay8910.h
+++ b/src/engine/platform/sound/ay8910.h
@@ -281,7 +281,6 @@ private:
 	// internal state
 	psg_type_t m_type;
 	int m_streams;
-	int m_ioports;
 	int m_ready;
 	//sound_stream *m_channel;
 	bool m_active;