diff --git a/src/emu/sound/wave.h b/src/emu/sound/wave.h
index 8421185d9ac..9a13ef11952 100644
--- a/src/emu/sound/wave.h
+++ b/src/emu/sound/wave.h
@@ -11,6 +11,9 @@
 
 DECLARE_LEGACY_SOUND_DEVICE(WAVE, wave);
 
+#define WAVE_TAG		"wave"
+#define WAVE2_TAG		"wave2"
+
 
 #define MCFG_SOUND_WAVE_ADD(_tag, _cass_tag) \
 	MCFG_SOUND_ADD( _tag, WAVE, 0 ) \