Index: /trunk/src/VBox/Devices/VirtIO/Virtio.cpp
===================================================================
--- /trunk/src/VBox/Devices/VirtIO/Virtio.cpp	(revision 29916)
+++ /trunk/src/VBox/Devices/VirtIO/Virtio.cpp	(revision 29917)
@@ -51,5 +51,5 @@
 static void vqueueInit(PVQUEUE pQueue, uint32_t uPageNumber)
 {
-    pQueue->VRing.addrDescriptors = uPageNumber << PAGE_SHIFT;
+    pQueue->VRing.addrDescriptors = (uint64_t)uPageNumber << PAGE_SHIFT;
     pQueue->VRing.addrAvail       = pQueue->VRing.addrDescriptors
         + sizeof(VRINGDESC) * pQueue->VRing.uSize;