Index: /trunk/src/VBox/Storage/VD.cpp
===================================================================
--- /trunk/src/VBox/Storage/VD.cpp	(revision 37072)
+++ /trunk/src/VBox/Storage/VD.cpp	(revision 37073)
@@ -1715,5 +1715,5 @@
                     if (rc == VINF_VD_ASYNC_IO_FINISHED)
                     {
-                        vdIoCtxUnlockDisk(pDisk, pIoCtxFlush, false /* fProcessDeferredReqs */);
+                        vdIoCtxUnlockDisk(pDisk, pIoCtx, false /* fProcessDeferredReqs */);
                         vdIoCtxFree(pDisk, pIoCtxFlush);
                     }