diff --git a/subsystems/ntvdm/ntvdm.h b/subsystems/ntvdm/ntvdm.h
index 89d02ffc338..d95402aece7 100644
--- a/subsystems/ntvdm/ntvdm.h
+++ b/subsystems/ntvdm/ntvdm.h
@@ -25,6 +25,7 @@
 #include <winuser.h>
 
 #include <vddsvc.h>
+// #include "registers.h"
 
 #include <debug.h>
 
diff --git a/subsystems/ntvdm/registers.c b/subsystems/ntvdm/registers.c
index fb86517b841..d3d5ce16675 100644
--- a/subsystems/ntvdm/registers.c
+++ b/subsystems/ntvdm/registers.c
@@ -11,7 +11,6 @@
 #define NDEBUG
 
 #include "emulator.h"
-#include "registers.h"
 
 /* PUBLIC FUNCTIONS ***********************************************************/
 
diff --git a/subsystems/ntvdm/registers.h b/subsystems/ntvdm/registers.h
index e36e75966a0..09568f3b7a8 100644
--- a/subsystems/ntvdm/registers.h
+++ b/subsystems/ntvdm/registers.h
@@ -13,6 +13,7 @@
 
 VOID EmulatorSetStack(WORD Segment, DWORD Offset);
 
+#if 0   // Those function prototypes are already included via ddk/vddsvc.h
 
 PVOID  WINAPI getIntelRegistersPointer(VOID);
 
@@ -115,6 +116,8 @@ VOID   WINAPI setEFLAGS(ULONG);
 USHORT WINAPI getMSW(VOID);
 VOID   WINAPI setMSW(USHORT);
 
+#endif
+
 #endif // _REGISTERS_H_
 
 /* EOF */
diff --git a/subsystems/ntvdm/vddsup.c b/subsystems/ntvdm/vddsup.c
index 2964c1e9ad8..c37c74a62f6 100644
--- a/subsystems/ntvdm/vddsup.c
+++ b/subsystems/ntvdm/vddsup.c
@@ -14,7 +14,6 @@
 #include "vddsup.h"
 
 #include "bop.h"
-#include "registers.h"
 
 #include <isvbop.h>