diff --git a/gnss/3.0/IGnss.hal b/gnss/3.0/IGnss.hal
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+++ b/gnss/3.0/IGnss.hal
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+/*
+ * Copyright (C) 2020 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package android.hardware.gnss@3.0;
+
+import @2.1::IGnss;
+import IGnssPsds;
+
+/**
+ * Represents the standard GNSS (Global Navigation Satellite System) interface.
+ */
+interface IGnss extends @2.1::IGnss {
+    /**
+     * This method returns the IGnssPsds interface.
+     *
+     * @return psdsIface Handle to the IGnssPsds interface.
+     */
+    getExtensionPsds() generates (IGnssPsds psdsIface);
+};