diff --git a/reactos/ntoskrnl/ke/i386/v86vdm.c b/reactos/ntoskrnl/ke/i386/v86vdm.c
index 7818e1c5a2c..c083bc4cac4 100644
--- a/reactos/ntoskrnl/ke/i386/v86vdm.c
+++ b/reactos/ntoskrnl/ke/i386/v86vdm.c
@@ -526,7 +526,9 @@ KiEnterV86Mode(IN PKV8086_STACK_FRAME StackFrame)
     TrapFrame->HardwareEsp = 0x11FFE;
     TrapFrame->ExceptionList = EXCEPTION_CHAIN_END;
     TrapFrame->Dr7 = 0;
-#ifdef TRAP_DEBUG
+
+    /* Set some debug fields if trap debugging is enabled */
+#if TRAP_DEBUG
     TrapFrame->DbgArgMark = 0xBADB0D00;
     TrapFrame->PreviousPreviousMode = -1;
 #endif