diff --git a/src/hardware/sblaster.cpp b/src/hardware/sblaster.cpp
index 9944e66f..af73d063 100644
--- a/src/hardware/sblaster.cpp
+++ b/src/hardware/sblaster.cpp
@@ -295,9 +295,9 @@ static void DSP_DMA_CallBack(DmaChannel * chan, DMAEvent event) {
 			min_size *= 2;
 			if (sb.dma.left > min_size) {
 				if (s > (sb.dma.left-min_size)) s = sb.dma.left - min_size;
-				GenerateDMASound(s);
+				if (s) GenerateDMASound(s);
 			}
-			sb.mode=MODE_DMA_MASKED;
+			sb.mode = MODE_DMA_MASKED;
 //			DSP_ChangeMode(MODE_DMA_MASKED);
 			LOG(LOG_SB,LOG_NORMAL)("DMA masked,stopping output, left %d",chan->currcnt);
 		}