diff --git a/BizHawk.Emulation.Cores/Computers/SinclairSpectrum/ZXSpectrum.cs b/BizHawk.Emulation.Cores/Computers/SinclairSpectrum/ZXSpectrum.cs
index c97a3c48d2..b07dfd6b9e 100644
--- a/BizHawk.Emulation.Cores/Computers/SinclairSpectrum/ZXSpectrum.cs
+++ b/BizHawk.Emulation.Cores/Computers/SinclairSpectrum/ZXSpectrum.cs
@@ -127,7 +127,7 @@ namespace BizHawk.Emulation.Cores.Computers.SinclairSpectrum
         //private byte[] _file;
         private readonly List<byte[]> _files;
 
-        public bool DiagRom = true;
+        public bool DiagRom = false;
 
         private List<string> diagRoms = new List<string>
         {