diff --git a/audio/2.0/default/StreamIn.h b/audio/2.0/default/StreamIn.h
index f7c17b7..65e94bb 100644
--- a/audio/2.0/default/StreamIn.h
+++ b/audio/2.0/default/StreamIn.h
@@ -80,11 +80,17 @@
     Return<void> read(uint64_t size, read_cb _hidl_cb)  override;
     Return<uint32_t> getInputFramesLost()  override;
     Return<void> getCapturePosition(getCapturePosition_cb _hidl_cb)  override;
+    Return<Result> start() override;
+    Return<Result> stop() override;
+    Return<void> createMmapBuffer(int32_t minSizeFrames, createMmapBuffer_cb _hidl_cb) override;
+    Return<void> getMmapPosition(getMmapPosition_cb _hidl_cb) override;
 
   private:
     audio_hw_device_t *mDevice;
     audio_stream_in_t *mStream;
     sp<Stream> mStreamCommon;
+    sp<StreamMmap<audio_stream_in_t>> mStreamMmap;
+
 
     virtual ~StreamIn();
 };