diff --git a/src/engine/platform/opll.cpp b/src/engine/platform/opll.cpp
index f49f4873..df4fca9e 100644
--- a/src/engine/platform/opll.cpp
+++ b/src/engine/platform/opll.cpp
@@ -440,7 +440,7 @@ int DivPlatformOPLL::dispatch(DivCommand c) {
           }
           rWrite(0x36,drumVol[0]);
           rWrite(0x37,drumVol[1]|(drumVol[4]<<4));
-          rWrite(0x38,drumVol[3]|(drumVol[2]<<4));
+          rWrite(0x38,drumVol[2]|(drumVol[3]<<4));
         }
         chan[c.chan].freqChanged=true;
       }
@@ -475,7 +475,7 @@ int DivPlatformOPLL::dispatch(DivCommand c) {
         drumVol[c.chan-6]=15-chan[c.chan].outVol;
         rWrite(0x36,drumVol[0]);
         rWrite(0x37,drumVol[1]|(drumVol[4]<<4));
-        rWrite(0x38,drumVol[3]|(drumVol[2]<<4));
+        rWrite(0x38,drumVol[2]|(drumVol[3]<<4));
         break;
       }
       if (c.chan<6 || !drums) {