diff --git a/gnss/2.0/default/Gnss.h b/gnss/2.0/default/Gnss.h
index 17e439f..7f14513 100644
--- a/gnss/2.0/default/Gnss.h
+++ b/gnss/2.0/default/Gnss.h
@@ -73,9 +73,13 @@
 
     // Methods from V2_0::IGnss follow.
     Return<sp<V2_0::IGnssMeasurement>> getExtensionGnssMeasurement_2_0() override;
+    Return<bool> setCallback_2_0(const sp<V2_0::IGnssCallback>& callback) override;
+    Return<sp<measurement_corrections::V1_0::IMeasurementCorrections>>
+    getExtensionMeasurementCorrections() override;
 
    private:
-    static sp<V1_1::IGnssCallback> sGnssCallback;
+    static sp<V2_0::IGnssCallback> sGnssCallback_2_0;
+    static sp<V1_1::IGnssCallback> sGnssCallback_1_1;
 };
 
 }  // namespace implementation
@@ -84,4 +88,4 @@
 }  // namespace hardware
 }  // namespace android
 
-#endif  // ANDROID_HARDWARE_GNSS_V2_0_GNSS_H
+#endif  // ANDROID_HARDWARE_GNSS_V2_0_GNSS_H
\ No newline at end of file