diff --git a/src/osgPlugins/ffmpeg/FFmpegAudioStream.cpp b/src/osgPlugins/ffmpeg/FFmpegAudioStream.cpp
index df9a4716b..8e6809e38 100644
--- a/src/osgPlugins/ffmpeg/FFmpegAudioStream.cpp
+++ b/src/osgPlugins/ffmpeg/FFmpegAudioStream.cpp
@@ -29,6 +29,8 @@ FFmpegAudioStream::FFmpegAudioStream(const FFmpegAudioStream & audio, const osg:
 
 FFmpegAudioStream::~FFmpegAudioStream()
 {
+    // detact the audio sink first to avoid destrction order issues.
+    setAudioSink(0);
 }
 
 void FFmpegAudioStream::setAudioSink(osg::AudioSink* audio_sink)