Index: /trunk/src/VBox/VMM/VMMAll/APICAll.cpp
===================================================================
--- /trunk/src/VBox/VMM/VMMAll/APICAll.cpp	(revision 60431)
+++ /trunk/src/VBox/VMM/VMMAll/APICAll.cpp	(revision 60432)
@@ -433,5 +433,7 @@
  * @returns Strict VBox status code.
  * @param   pVM                 The cross context VM structure.
- * @param   pVCpu               The cross context virtual CPU structure.
+ * @param   pVCpu               The cross context virtual CPU structure, can be
+ *                              NULL if the source of the interrupt is not an
+ *                              APIC (for e.g. a bus).
  * @param   uVector             The interrupt vector.
  * @param   enmTriggerMode      The trigger mode.