diff --git a/include/hardware/audio.h b/include/hardware/audio.h
index ca7b18b..cce4d94 100644
--- a/include/hardware/audio.h
+++ b/include/hardware/audio.h
@@ -28,6 +28,9 @@
 #include <hardware/hardware.h>
 #include <system/audio.h>
 #include <hardware/audio_effect.h>
+#ifdef AUDIO_LISTEN_ENABLED
+#include <listen_types.h>
+#endif
 
 __BEGIN_DECLS
 
@@ -652,6 +655,28 @@
     int (*set_audio_port_config)(struct audio_hw_device *dev,
                          const struct audio_port_config *config);
 
+#ifdef AUDIO_LISTEN_ENABLED
+    /** This method creates the listen session and returns handle */
+    int (*open_listen_session)(struct audio_hw_device *dev,
+                              listen_open_params_t *params,
+                              struct listen_session** handle);
+
+    /** This method closes the listen session  */
+    int (*close_listen_session)(struct audio_hw_device *dev,
+                                struct listen_session* handle);
+
+    /** This method sets the mad observer callback  */
+    int (*set_mad_observer)(struct audio_hw_device *dev,
+                            listen_callback_t cb_func);
+
+   /**
+     *   This method is used for setting listen hal specfic parameters.
+     *  If multiple paramets are set in one call and setting any one of them
+     *  fails it will return failure.
+     */
+    int (*listen_set_parameters)(struct audio_hw_device *dev,
+                                 const char *kv_pairs);
+#endif
 };
 typedef struct audio_hw_device audio_hw_device_t;