diff --git a/services/audioflinger/Threads.cpp b/services/audioflinger/Threads.cpp
index 3d657b3..a9eaa8a 100644
--- a/services/audioflinger/Threads.cpp
+++ b/services/audioflinger/Threads.cpp
@@ -4306,10 +4306,13 @@
             mOutputTracks[i]->destroy();
             mOutputTracks.removeAt(i);
             updateWaitTime_l();
+            if (thread->getOutput() == mOutput) {
+                mOutput = NULL;
+            }
             return;
         }
     }
-    ALOGV("removeOutputTrack(): unkonwn thread: %p", thread);
+    ALOGV("removeOutputTrack(): unknown thread: %p", thread);
 }
 
 // caller must hold mLock