diff --git a/src/emucore/tia/TIA.cxx b/src/emucore/tia/TIA.cxx
index cf0b35be8..9d9f0ebf7 100644
--- a/src/emucore/tia/TIA.cxx
+++ b/src/emucore/tia/TIA.cxx
@@ -199,7 +199,7 @@ void TIA::reset()
   // from the constructor
   initialize();
 
-  if(myRandomize)
+  if(myRandomize && !mySystem->autodetectMode())
   {
     for(uInt32 i = 0; i < 0x10000; ++i)
     {