diff --git a/gnss/aidl/default/Gnss.h b/gnss/aidl/default/Gnss.h
index 9864e9d..61d7cf7 100644
--- a/gnss/aidl/default/Gnss.h
+++ b/gnss/aidl/default/Gnss.h
@@ -17,12 +17,24 @@
 #pragma once
 
 #include <aidl/android/hardware/gnss/BnGnss.h>
+#include <aidl/android/hardware/gnss/BnGnssConfiguration.h>
 #include <aidl/android/hardware/gnss/BnGnssPsds.h>
+#include "GnssConfiguration.h"
 
 namespace aidl::android::hardware::gnss {
 
 class Gnss : public BnGnss {
+  public:
+    ndk::ScopedAStatus setCallback(const std::shared_ptr<IGnssCallback>& callback) override;
+    ndk::ScopedAStatus close() override;
     ndk::ScopedAStatus getExtensionPsds(std::shared_ptr<IGnssPsds>* iGnssPsds) override;
+    ndk::ScopedAStatus getExtensionGnssConfiguration(
+            std::shared_ptr<IGnssConfiguration>* iGnssConfiguration) override;
+
+    std::shared_ptr<GnssConfiguration> mGnssConfiguration;
+
+  private:
+    static std::shared_ptr<IGnssCallback> sGnssCallback;
 };
 
 }  // namespace aidl::android::hardware::gnss