diff --git a/src/engine/platform/genesis.cpp b/src/engine/platform/genesis.cpp
index b20d8ab62..e7f705ff2 100644
--- a/src/engine/platform/genesis.cpp
+++ b/src/engine/platform/genesis.cpp
@@ -20,12 +20,12 @@ void DivPlatformGenesis::acquire(short* bufL, short* bufR, size_t start, size_t
         DivSample* s=parent->song.sample[dacSample];
         if (!isMuted[5]) {
           if (s->depth==8) {
-            immWrite(0x2a,(unsigned char)s->rendData[dacPos++]+0x80);
+            immWrite(0x2a,(unsigned char)s->rendData[dacPos]+0x80);
           } else {
-            immWrite(0x2a,((unsigned short)s->rendData[dacPos++]+0x8000)>>8);
+            immWrite(0x2a,((unsigned short)s->rendData[dacPos]+0x8000)>>8);
           }
         }
-        if (dacPos>=s->rendLength) {
+        if (++dacPos>=s->rendLength) {
           if (s->loopStart>=0 && s->loopStart<=(int)s->rendLength) {
             dacPos=s->loopStart;
           } else {