diff --git a/src/emu/sound/sn76496.h b/src/emu/sound/sn76496.h
index 3d1c5f4592b..bedee2de532 100644
--- a/src/emu/sound/sn76496.h
+++ b/src/emu/sound/sn76496.h
@@ -33,6 +33,7 @@ public:
 	DECLARE_WRITE8_MEMBER( stereo_w );
 	void write(UINT8 data);
 	DECLARE_WRITE8_MEMBER( write );
+	DECLARE_READ_LINE_MEMBER( ready_r ) { return m_ready_state ? 1 : 0; }
 
 protected:
 	virtual void    device_start();