diff --git a/src/anbox/platform/sdl/audio_sink.cpp b/src/anbox/platform/sdl/audio_sink.cpp
index 0ed90e2c48252795cbbabc885384a8b81ea2f937..d13ee3c7b172b4ac9bda3fb91d9efa9efe8850a5 100755
--- a/src/anbox/platform/sdl/audio_sink.cpp
+++ b/src/anbox/platform/sdl/audio_sink.cpp
@@ -40,6 +40,7 @@ AudioSink::~AudioSink() {
   mThreadExit = true;
   if (t != NULL) {
     free(t);
+    t = NULL;
   }
   queue_.close_locked();
   disconnect_audio();