diff --git a/soundtrigger/2.3/default/SoundTriggerHw.h b/soundtrigger/2.3/default/SoundTriggerHw.h
index c82c9ea..078debb 100644
--- a/soundtrigger/2.3/default/SoundTriggerHw.h
+++ b/soundtrigger/2.3/default/SoundTriggerHw.h
@@ -85,6 +85,7 @@
     Return<int32_t> getModelState(int32_t modelHandle) override;
 
     // Methods from V2_3::ISoundTriggerHw follow.
+    Return<void> getProperties_2_3(getProperties_2_3_cb _hidl_cb) override;
     Return<int32_t> setParameter(V2_0::SoundModelHandle modelHandle, ModelParameter modelParam,
                                  int32_t value) override;
     Return<void> getParameter(V2_0::SoundModelHandle modelHandle, ModelParameter modelParam,
@@ -156,6 +157,8 @@
     void convertUuidToHal(sound_trigger_uuid_t* halUuid, const Uuid* uuid);
     void convertPropertiesFromHal(V2_0::ISoundTriggerHw::Properties* properties,
                                   const struct sound_trigger_properties* halProperties);
+    void convertPropertiesFromHal(V2_3::Properties* properties,
+                                  const struct sound_trigger_properties_header* header);
     static sound_trigger_model_parameter_t convertModelParameterToHal(ModelParameter param);
     void convertTriggerPhraseToHal(struct sound_trigger_phrase* halTriggerPhrase,
                                    const V2_0::ISoundTriggerHw::Phrase* triggerPhrase);