Index: /trunk/include/VBox/pdmdev.h
===================================================================
--- /trunk/include/VBox/pdmdev.h	(revision 30194)
+++ /trunk/include/VBox/pdmdev.h	(revision 30195)
@@ -399,4 +399,6 @@
 /** Parallel controller device */
 #define PDM_DEVREG_CLASS_PARALLEL               RT_BIT(17)
+/** Host PCI pass-through device */
+#define PDM_DEVREG_CLASS_HOST_DEV               RT_BIT(18)
 /** Misc devices (always last). */
 #define PDM_DEVREG_CLASS_MISC                   RT_BIT(31)