Index: /trunk/src/VBox/VMM/VMMAll/PGMAllBth.h
===================================================================
--- /trunk/src/VBox/VMM/VMMAll/PGMAllBth.h	(revision 26190)
+++ /trunk/src/VBox/VMM/VMMAll/PGMAllBth.h	(revision 26191)
@@ -246,7 +246,7 @@
      *
      */
+    Assert(PdeSrc.n.u1Present);
     if (    !(uErr & X86_TRAP_PF_P) /* not set means page not present instead of page protection violation */
         &&  !pPDDst->a[iPDDst].n.u1Present
-        &&  PdeSrc.n.u1Present
     )
     {