diff --git a/include/media/AudioSystem.h b/include/media/AudioSystem.h
index f20e234..eb22e32 100644
--- a/include/media/AudioSystem.h
+++ b/include/media/AudioSystem.h
@@ -108,6 +108,8 @@
     static unsigned int  getInputFramesLost(audio_io_handle_t ioHandle);
 
     static int newAudioSessionId();
+    static void acquireAudioSessionId(int audioSession);
+    static void releaseAudioSessionId(int audioSession);
 
     // types of io configuration change events received with ioConfigChanged()
     enum io_config_event {
diff --git a/include/media/IAudioFlinger.h b/include/media/IAudioFlinger.h
index 4037c46..9e3cb7f 100644
--- a/include/media/IAudioFlinger.h
+++ b/include/media/IAudioFlinger.h
@@ -139,6 +139,9 @@
 
     virtual int newAudioSessionId() = 0;
 
+    virtual void acquireAudioSessionId(int audioSession) = 0;
+    virtual void releaseAudioSessionId(int audioSession) = 0;
+
     virtual status_t queryNumberEffects(uint32_t *numEffects) = 0;
 
     virtual status_t queryEffect(uint32_t index, effect_descriptor_t *pDescriptor) = 0;