diff --git a/src/mess/audio/vboy.c b/src/mess/audio/vboy.c
index d35b584d7b6..07def8501ab 100644
--- a/src/mess/audio/vboy.c
+++ b/src/mess/audio/vboy.c
@@ -32,7 +32,7 @@ const device_type VBOYSND = &device_creator<vboysnd_device>;
 #define S5SWP		0x51c
 #define SST0P		0x580
 
-static const INT16 outTbl[64][32] = {
+static const UINT16 outTbl[64][32] = {
     { 0x0000, 0xffe0, 0xffc0, 0xffa0, 0xff80, 0xff60, 0xff40, 0xff20, 0xff00, 0xfee0, 0xfec0, 0xfea0, 0xfe80, 0xfe60, 0xfe40, 0xfe20,
       0xfe00, 0xfde0, 0xfdc0, 0xfda0, 0xfd80, 0xfd60, 0xfd40, 0xfd20, 0xfd00, 0xfce0, 0xfcc0, 0xfca0, 0xfc80, 0xfc60, 0xfc40, 0xfc20},
     { 0x0000, 0xffe1, 0xffc2, 0xffa3, 0xff84, 0xff65, 0xff46, 0xff27, 0xff08, 0xfee9, 0xfeca, 0xfeab, 0xfe8c, 0xfe6d, 0xfe4e, 0xfe2f,
@@ -350,7 +350,7 @@ void vboysnd_device::sound_stream_update(sound_stream &stream, stream_sample_t *
 				}
 			}
 
-			outTblPtr = outTbl[channel->sample[channel->offset]];
+			outTblPtr = (INT16 *) outTbl[channel->sample[channel->offset]];
 			if (outLeft)  note_left  += outTblPtr[outLeft ];
 			if (outRight) note_right += outTblPtr[outRight];
 			channel->offset++;