Index: /trunk/src/VBox/HostDrivers/Support/SUPDrv.c
===================================================================
--- /trunk/src/VBox/HostDrivers/Support/SUPDrv.c	(revision 24021)
+++ /trunk/src/VBox/HostDrivers/Support/SUPDrv.c	(revision 24022)
@@ -228,5 +228,5 @@
 /* RTThreadPreemptIsPending - not necessary */
 /* RTThreadPreemptIsPendingTrusty - not necessary */
-/* RTThreadPreemptDisable - not necessary */
+DECLASM(void)   UNWIND_WRAP(RTThreadPreemptDisable)(PRTTHREADPREEMPTSTATE pState);
 DECLASM(void)   UNWIND_WRAP(RTThreadPreemptRestore)(RTTHREADPREEMPTSTATE pState);
 /* RTLogDefaultInstance   - a bit of a gamble, but we do not want the overhead! */
@@ -395,5 +395,5 @@
     { "RTThreadPreemptIsPendingTrusty",         (void *)RTThreadPreemptIsPendingTrusty },
     { "RTThreadPreemptIsPossible",              (void *)RTThreadPreemptIsPossible },
-    { "RTThreadPreemptDisable",                 (void *)RTThreadPreemptDisable },
+    { "RTThreadPreemptDisable",                 (void *)UNWIND_WRAP(RTThreadPreemptDisable) },
     { "RTThreadPreemptRestore",                 (void *)UNWIND_WRAP(RTThreadPreemptRestore) },
     { "RTThreadIsInInterrupt",                  (void *)RTThreadIsInInterrupt },
Index: /trunk/src/VBox/HostDrivers/Support/win/SUPDrvA-win.asm
===================================================================
--- /trunk/src/VBox/HostDrivers/Support/win/SUPDrvA-win.asm	(revision 24021)
+++ /trunk/src/VBox/HostDrivers/Support/win/SUPDrvA-win.asm	(revision 24022)
@@ -162,5 +162,5 @@
 ;NtWrapDyn2DrvFunctionWithAllRegParams  supdrvNtWrap, RTThreadPreemptIsPending - not necessary
 ;NtWrapDyn2DrvFunctionWithAllRegParams  supdrvNtWrap, RTThreadPreemptIsPendingTrusty - not necessary
-;NtWrapDyn2DrvFunctionWithAllRegParams  supdrvNtWrap, RTThreadPreemptDisable - not necessary
+NtWrapDyn2DrvFunctionWithAllRegParams  supdrvNtWrap, RTThreadPreemptDisable
 NtWrapDyn2DrvFunctionWithAllRegParams  supdrvNtWrap, RTThreadPreemptRestore
 ;NtWrapDyn2DrvFunctionWithAllRegParams  supdrvNtWrap, RTLogDefaultInstance   - a bit of a gamble, but we do not want the overhead!