Index: /trunk/src/VBox/HostDrivers/VBoxUSB/win/dev/VBoxUsbRt.cpp
===================================================================
--- /trunk/src/VBox/HostDrivers/VBoxUSB/win/dev/VBoxUsbRt.cpp	(revision 54799)
+++ /trunk/src/VBox/HostDrivers/VBoxUSB/win/dev/VBoxUsbRt.cpp	(revision 54800)
@@ -634,5 +634,5 @@
                     for (i = 0; i < pDevExt->Rt.uNumInterfaces; i++)
                     {
-                        size_t uTotalIfaceInfoLength = RT_OFFSETOF(struct _USBD_INTERFACE_INFORMATION, Pipes[RT_MAX(pIfLe[i].Interface->NumberOfPipes, 1)]);
+                        size_t uTotalIfaceInfoLength = GET_USBD_INTERFACE_SIZE(pIfLe[i].Interface->NumberOfPipes);
                         pDevExt->Rt.pVBIfaceInfo[i].pInterfaceInfo = (PUSBD_INTERFACE_INFORMATION)vboxUsbMemAlloc(uTotalIfaceInfoLength);
                         if (!pDevExt->Rt.pVBIfaceInfo[i].pInterfaceInfo)
@@ -824,5 +824,4 @@
                 for(ULONG i = 0; i < pIfInfo->NumberOfPipes; i++)
                 {
-                    pDevExt->Rt.pVBIfaceInfo[InterfaceNumber].pInterfaceInfo->Pipes[i] = pIfInfo->Pipes[i];
                     pDevExt->Rt.pVBIfaceInfo[InterfaceNumber].pPipeInfo[i].EndpointAddress = pIfInfo->Pipes[i].EndpointAddress;
                     pDevExt->Rt.pVBIfaceInfo[InterfaceNumber].pPipeInfo[i].NextScheduledFrame = 0;