diff --git a/reactos/ntoskrnl/include/internal/amd64/intrin_i.h b/reactos/ntoskrnl/include/internal/amd64/intrin_i.h
index a4073a8694e..d3dca40eaf2 100644
--- a/reactos/ntoskrnl/include/internal/amd64/intrin_i.h
+++ b/reactos/ntoskrnl/include/internal/amd64/intrin_i.h
@@ -106,36 +106,17 @@ static __inline__ __attribute__((always_inline)) void __str(unsigned short *Dest
 
 #define UNIMPLEMENTED DbgPrint("%s is unimplemented!!!\n", __FUNCTION__);
 
-void FORCEINLINE __lgdt(void *Source)
-{
-	UNIMPLEMENTED;
-}
+void __lgdt(void *Source);
 
-void FORCEINLINE __sgdt(void *Destination)
-{
-	UNIMPLEMENTED;
-}
+void __sgdt(void *Destination);
 
-void FORCEINLINE __lldt(unsigned short Value)
-{
-	UNIMPLEMENTED;
-}
+void __lldt(unsigned short Value);
 
-void FORCEINLINE __sldt(void *Destination)
-{
-	UNIMPLEMENTED;
-}
+void __sldt(void *Destination);
 
-void FORCEINLINE __ltr(unsigned short Source)
-{
-	UNIMPLEMENTED;
-}
-
-void FORCEINLINE __str(unsigned short *Destination)
-{
-	UNIMPLEMENTED;
-}
+void __ltr(unsigned short Source);
 
+void __str(unsigned short *Destination);
 
 
 #else
diff --git a/reactos/ntoskrnl/ke/amd64/trap.S b/reactos/ntoskrnl/ke/amd64/trap.S
index 5088a51b554..5c776039951 100644
--- a/reactos/ntoskrnl/ke/amd64/trap.S
+++ b/reactos/ntoskrnl/ke/amd64/trap.S
@@ -905,6 +905,44 @@ PUBLIC KiUnexpectedInterrupt
     jmp $
 .ENDP KiUnexpectedInterrupt
 
+#ifdef _MSC_VER
 
+//void __lgdt(void *Source);
+PUBLIC __lgdt
+__lgdt:
+    lgdt fword ptr [rcx]
+    ret
+
+//void __sgdt(void *Destination);
+PUBLIC __sgdt
+__sgdt:
+    sgdt fword ptr [rcx]
+    ret
+
+// void __lldt(unsigned short Value)
+PUBLIC __lldt
+__lldt:
+    lldt cx
+    ret
+
+//void __sldt(void *Destination);
+PUBLIC __sldt
+__sldt:
+    sldt word ptr [rcx]
+    ret
+
+//void __ltr(unsigned short Source);
+PUBLIC __ltr
+__ltr:
+    ltr cx
+    ret
+
+//void __str(unsigned short *Destination);
+PUBLIC __str
+__str:
+    str word ptr [rcx]
+    ret
+
+#endif
 
 END