diff --git a/services/audiopolicy/AudioPolicyInterface.h b/services/audiopolicy/AudioPolicyInterface.h
index 48d0e29..4fa472e 100644
--- a/services/audiopolicy/AudioPolicyInterface.h
+++ b/services/audiopolicy/AudioPolicyInterface.h
@@ -320,6 +320,8 @@
     virtual void onAudioPatchListUpdate() = 0;
 
     virtual audio_unique_id_t newAudioUniqueId() = 0;
+
+    virtual void onDynamicPolicyMixStateUpdate(String8 regId, int32_t state) = 0;
 };
 
 extern "C" AudioPolicyInterface* createAudioPolicyManager(AudioPolicyClientInterface *clientInterface);