diff --git a/source2/IL2CPU/Cosmos.IL2CPU.X86/CosmosAssembler.cs b/source2/IL2CPU/Cosmos.IL2CPU.X86/CosmosAssembler.cs
index f86f9f0eb..0b83014b4 100644
--- a/source2/IL2CPU/Cosmos.IL2CPU.X86/CosmosAssembler.cs
+++ b/source2/IL2CPU/Cosmos.IL2CPU.X86/CosmosAssembler.cs
@@ -160,7 +160,9 @@ namespace Cosmos.IL2CPU.X86 {
       DataMembers.Add(new DataMember("_NATIVE_IDT_Contents", new byte[xIdtSize]));
       //
       //SetIdtDescriptor(1, "DebugStub_INT0");
-      SetIdtDescriptor(3, "DebugStub_TracerEntry", false);
+	  if (mComNumber > 0) {
+		  SetIdtDescriptor(3, "DebugStub_TracerEntry", false);
+	  }
       //SetIdtDescriptor(1, "DebugStub_INT0"); - Change to GPF
 
       // Set IDT