Index: /trunk/src/VBox/VMM/PGMPhys.cpp
===================================================================
--- /trunk/src/VBox/VMM/PGMPhys.cpp	(revision 30231)
+++ /trunk/src/VBox/VMM/PGMPhys.cpp	(revision 30232)
@@ -3387,5 +3387,5 @@
 
     /* Must be callable from any thread, so can't use VMMR3CallR0. */
-    rc = SUPR3CallVMMR0Ex(pVM->pVMR0, pVCpu->idCpu, VMMR0_DO_GMM_MAP_UNMAP_CHUNK, 0, &Req.Hdr);
+    rc = SUPR3CallVMMR0Ex(pVM->pVMR0, VMMGetCpuId(pVM), VMMR0_DO_GMM_MAP_UNMAP_CHUNK, 0, &Req.Hdr);
     if (RT_SUCCESS(rc))
     {