diff --git a/src/mame/audio/namco54.h b/src/mame/audio/namco54.h
index 08d06144e36..c7a246aaf67 100644
--- a/src/mame/audio/namco54.h
+++ b/src/mame/audio/namco54.h
@@ -7,13 +7,6 @@
 #include "cpu/mb88xx/mb88xx.h"
 
 
-struct namco_54xx_config
-{
-	const char *discrete;   /* name of the discrete sound device */
-	int         firstnode;  /* index of the first node */
-};
-
-
 #define MCFG_NAMCO_54XX_ADD(_tag, _clock) \
 	MCFG_DEVICE_ADD(_tag, NAMCO_54XX, _clock)
 
@@ -24,9 +17,6 @@ struct namco_54xx_config
 	namco_54xx_device::set_basenote(*device, _node);
 
 
-DECLARE_WRITE8_DEVICE_HANDLER( namco_54xx_write );
-
-
 class namco_54xx_device : public device_t
 {
 public: