diff --git a/hw/audio/fmopl.c b/hw/audio/fmopl.c
index 99d09c55b3..dc9043c32d 100644
--- a/hw/audio/fmopl.c
+++ b/hw/audio/fmopl.c
@@ -1036,7 +1036,7 @@ void YM3812UpdateOne(FM_OPL *OPL, int16_t *buffer, int length)
 }
 
 /* ---------- reset one of chip ---------- */
-void OPLResetChip(FM_OPL *OPL)
+static void OPLResetChip(FM_OPL *OPL)
 {
 	int c,s;
 	int i;
diff --git a/hw/audio/fmopl.h b/hw/audio/fmopl.h
index f89af0884d..fc9f16b58a 100644
--- a/hw/audio/fmopl.h
+++ b/hw/audio/fmopl.h
@@ -95,7 +95,6 @@ FM_OPL *OPLCreate(int clock, int rate);
 void OPLDestroy(FM_OPL *OPL);
 void OPLSetTimerHandler(FM_OPL *OPL,OPL_TIMERHANDLER TimerHandler,int channelOffset);
 
-void OPLResetChip(FM_OPL *OPL);
 int OPLWrite(FM_OPL *OPL,int a,int v);
 unsigned char OPLRead(FM_OPL *OPL,int a);
 int OPLTimerOver(FM_OPL *OPL,int c);