diff --git a/gnss/2.1/IGnss.hal b/gnss/2.1/IGnss.hal
index 812f9cc..2d63392 100644
--- a/gnss/2.1/IGnss.hal
+++ b/gnss/2.1/IGnss.hal
@@ -20,6 +20,7 @@
 
 import IGnssCallback;
 import IGnssMeasurement;
+import IGnssConfiguration;
 
 /**
  * Represents the standard GNSS (Global Navigation Satellite System) interface.
@@ -50,4 +51,15 @@
      * @return gnssMeasurementIface Handle to the IGnssMeasurement interface.
      */
     getExtensionGnssMeasurement_2_1() generates (IGnssMeasurement gnssMeasurementIface);
+
+    /**
+     * This method returns the IGnssConfiguration interface.
+     *
+     * At least one of getExtensionGnssConfiguration(), getExtensionGnssConfiguration_1_1(),
+     * getExtensionGnssConfiguration_2_0(), and getExtensionGnssConfiguration_2_1() methods must
+     * return a non-null handle, and the other methods must return nullptr.
+     *
+     * @return gnssConfigurationIface Handle to the IGnssConfiguration interface.
+     */
+    getExtensionGnssConfiguration_2_1() generates (IGnssConfiguration gnssConfigurationIface);
 };
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