diff --git a/reactos/boot/bootdata/packages/reactos.dff b/reactos/boot/bootdata/packages/reactos.dff
index d78742bc0ef..f58d4ae39fb 100644
--- a/reactos/boot/bootdata/packages/reactos.dff
+++ b/reactos/boot/bootdata/packages/reactos.dff
@@ -265,10 +265,10 @@ drivers\network\dd\pcnet\pcnet.sys                  2
 drivers\storage\pciide\pciide.sys                   2
 drivers\storage\pciidex\pciidex.sys                 2
 
-drivers\usb\miniport\usbohci\usbohci.sys            2
-drivers\usb\miniport\usbuhci\usbuhci.sys            2
-drivers\usb\usbhub\usbhub.sys                       2
-drivers\usb\usbport\usbport.sys                     2
+;drivers\usb\miniport\usbohci\usbohci.sys            2
+;drivers\usb\miniport\usbuhci\usbuhci.sys            2
+;drivers\usb\usbhub\usbhub.sys                       2
+;drivers\usb\usbport\usbport.sys                     2
 
 drivers\video\displays\vga\vgaddi.dll               1
 drivers\video\displays\framebuf\framebuf.dll        1
diff --git a/reactos/ntoskrnl/io/iomgr/iomgr.c b/reactos/ntoskrnl/io/iomgr/iomgr.c
index 6e656d69600..2c1149fdc4e 100644
--- a/reactos/ntoskrnl/io/iomgr/iomgr.c
+++ b/reactos/ntoskrnl/io/iomgr/iomgr.c
@@ -15,6 +15,15 @@
 
 ULONG IopTraceLevel = IO_IRP_DEBUG;
 
+// should go into a proper header
+VOID
+NTAPI
+IoSynchronousInvalidateDeviceRelations(
+    IN PDEVICE_OBJECT DeviceObject,
+    IN DEVICE_RELATION_TYPE Type
+);
+
+
 /* DATA ********************************************************************/
 
 POBJECT_TYPE IoDeviceObjectType = NULL;
@@ -448,7 +457,7 @@ IoInit2(BOOLEAN BootLog)
   /*
    * Initialize PnP root releations
    */
-  IoInvalidateDeviceRelations(
+  IoSynchronousInvalidateDeviceRelations(
     IopRootDeviceNode->PhysicalDeviceObject,
     BusRelations);