Index: /trunk/src/VBox/Devices/Audio/DrvHostNullAudio.cpp
===================================================================
--- /trunk/src/VBox/Devices/Audio/DrvHostNullAudio.cpp	(revision 61923)
+++ /trunk/src/VBox/Devices/Audio/DrvHostNullAudio.cpp	(revision 61924)
@@ -278,5 +278,6 @@
     NOREF(pStream);
 
-    return (PDMAUDIOSTRMSTS_FLAG_INITIALIZED | PDMAUDIOSTRMSTS_FLAG_ENABLED);
+    return (  PDMAUDIOSTRMSTS_FLAG_INITIALIZED | PDMAUDIOSTRMSTS_FLAG_ENABLED
+            | PDMAUDIOSTRMSTS_FLAG_DATA_READABLE | PDMAUDIOSTRMSTS_FLAG_DATA_WRITABLE);
 }