diff --git a/Aaru.Core/Devices/Dumping/MMC.cs b/Aaru.Core/Devices/Dumping/MMC.cs
index 0b15889fe..79edd679d 100644
--- a/Aaru.Core/Devices/Dumping/MMC.cs
+++ b/Aaru.Core/Devices/Dumping/MMC.cs
@@ -195,11 +195,14 @@ namespace Aaru.Core.Devices.Dumping
 
             if(compactDisc)
             {
+                _speedMultiplier *= 177;
                 CompactDisc();
 
                 return;
             }
 
+            _speedMultiplier *= 150;
+
             var   scsiReader = new Reader(_dev, _dev.Timeout, null, _dumpRaw);
             ulong blocks     = scsiReader.GetDeviceBlocks();
             _dumpLog.WriteLine("Device reports disc has {0} blocks", blocks);