Index: /trunk/src/VBox/Devices/Audio/DrvHostDSound.cpp
===================================================================
--- /trunk/src/VBox/Devices/Audio/DrvHostDSound.cpp	(revision 73529)
+++ /trunk/src/VBox/Devices/Audio/DrvHostDSound.cpp	(revision 73530)
@@ -2212,5 +2212,6 @@
     if (RT_SUCCESS(rc))
     {
-        rc = RTCritSectDelete(&pStreamDS->CritSect);
+        if (RTCritSectIsInitialized(&pStreamDS->CritSect))
+            rc = RTCritSectDelete(&pStreamDS->CritSect);
     }