diff --git a/ntoskrnl/ex/dbgctrl.c b/ntoskrnl/ex/dbgctrl.c
index a62345ee692..5ed32619fee 100644
--- a/ntoskrnl/ex/dbgctrl.c
+++ b/ntoskrnl/ex/dbgctrl.c
@@ -267,7 +267,17 @@ NtSystemDebugControl(
             case SysDbgWriteBusData:
             case SysDbgCheckLowMemory:
                 /* Those are implemented in KdSystemDebugControl */
-                Status = STATUS_NOT_IMPLEMENTED;
+                if (InitIsWinPEMode)
+                {
+                    Status = KdSystemDebugControl(Command,
+                                                  InputBuffer, InputBufferLength,
+                                                  OutputBuffer, OutputBufferLength,
+                                                  &Length, PreviousMode);
+                }
+                else
+                {
+                    Status = STATUS_NOT_IMPLEMENTED;
+                }
                 break;
 
             case SysDbgBreakPoint: