diff --git a/hw/audio/adlib.c b/hw/audio/adlib.c
index f9adcd7..09b8248 100644
--- a/hw/audio/adlib.c
+++ b/hw/audio/adlib.c
@@ -265,7 +265,7 @@
     }
     glob_adlib = s;
 
-    s->opl = OPLCreate (OPL_TYPE_YM3812, 3579545, s->freq);
+    s->opl = OPLCreate (3579545, s->freq);
     if (!s->opl) {
         error_setg (errp, "OPLCreate %d failed", s->freq);
         return;
diff --git a/hw/audio/fmopl.c b/hw/audio/fmopl.c
index 9171001..48db828 100644
--- a/hw/audio/fmopl.c
+++ b/hw/audio/fmopl.c
@@ -761,18 +761,15 @@
 		{
 		case 0x01:
 			/* wave selector enable */
-			if(OPL->type&OPL_TYPE_WAVESEL)
+			OPL->wavesel = v&0x20;
+                        if(!OPL->wavesel)
 			{
-				OPL->wavesel = v&0x20;
-				if(!OPL->wavesel)
+				/* preset compatible mode */
+				int c;
+				for(c=0;c<OPL->max_ch;c++)
 				{
-					/* preset compatible mode */
-					int c;
-					for(c=0;c<OPL->max_ch;c++)
-					{
-						OPL->P_CH[c].SLOT[SLOT1].wavetable = &SIN_TABLE[0];
-						OPL->P_CH[c].SLOT[SLOT2].wavetable = &SIN_TABLE[0];
-					}
+					OPL->P_CH[c].SLOT[SLOT1].wavetable = &SIN_TABLE[0];
+					OPL->P_CH[c].SLOT[SLOT2].wavetable = &SIN_TABLE[0];
 				}
 			}
 			return;
@@ -1076,7 +1073,7 @@
 
 /* ----------  Create one of vietual YM3812 ----------       */
 /* 'rate'  is sampling rate and 'bufsiz' is the size of the  */
-FM_OPL *OPLCreate(int type, int clock, int rate)
+FM_OPL *OPLCreate(int clock, int rate)
 {
 	char *ptr;
 	FM_OPL *OPL;
@@ -1095,7 +1092,6 @@
 	OPL        = (FM_OPL *)ptr; ptr+=sizeof(FM_OPL);
 	OPL->P_CH  = (OPL_CH *)ptr; ptr+=sizeof(OPL_CH)*max_ch;
 	/* set channel state pointer */
-	OPL->type  = type;
 	OPL->clock = clock;
 	OPL->rate  = rate;
 	OPL->max_ch = max_ch;
diff --git a/hw/audio/fmopl.h b/hw/audio/fmopl.h
index 8ef0b3e..df790a0 100644
--- a/hw/audio/fmopl.h
+++ b/hw/audio/fmopl.h
@@ -11,8 +11,6 @@
 
 /* !!!!! here is private section , do not access there member direct !!!!! */
 
-#define OPL_TYPE_WAVESEL   0x01  /* waveform select    */
-
 /* Saving is necessary for member of the 'R' mark for suspend/resume */
 /* ---------- OPL one of slot  ---------- */
 typedef struct fm_opl_slot {
@@ -62,7 +60,6 @@
 
 /* OPL state */
 typedef struct fm_opl_f {
-	uint8_t type;			/* chip type                         */
 	int clock;			/* master clock  (Hz)                */
 	int rate;			/* sampling rate (Hz)                */
 	double freqbase;	/* frequency base                    */
@@ -108,9 +105,7 @@
 } FM_OPL;
 
 /* ---------- Generic interface section ---------- */
-#define OPL_TYPE_YM3812 (OPL_TYPE_WAVESEL)
-
-FM_OPL *OPLCreate(int type, int clock, int rate);
+FM_OPL *OPLCreate(int clock, int rate);
 void OPLDestroy(FM_OPL *OPL);
 void OPLSetTimerHandler(FM_OPL *OPL,OPL_TIMERHANDLER TimerHandler,int channelOffset);
 void OPLSetIRQHandler(FM_OPL *OPL,OPL_IRQHANDLER IRQHandler,int param);