diff --git a/core/java/android/provider/Settings.java b/core/java/android/provider/Settings.java
index b55a349c14a93..ff86ff3ff0763 100755
--- a/core/java/android/provider/Settings.java
+++ b/core/java/android/provider/Settings.java
@@ -8282,6 +8282,16 @@ public final class Settings {
         public static final String NETWORK_RECOMMENDATION_REQUEST_TIMEOUT_MS =
                 "network_recommendation_request_timeout_ms";
 
+        /**
+         * The expiration time in milliseconds for the {@link android.net.WifiKey} request cache in
+         * {@link com.android.server.wifi.RecommendedNetworkEvaluator}.
+         *
+         * Type: long
+         * @hide
+         */
+        public static final String RECOMMENDED_NETWORK_EVALUATOR_CACHE_EXPIRY_MS =
+                "recommended_network_evaluator_cache_expiry_ms";
+
        /**
         * Settings to allow BLE scans to be enabled even when Bluetooth is turned off for
         * connectivity.
diff --git a/core/tests/coretests/src/android/provider/SettingsBackupTest.java b/core/tests/coretests/src/android/provider/SettingsBackupTest.java
index b718263048711..105a351456dc0 100644
--- a/core/tests/coretests/src/android/provider/SettingsBackupTest.java
+++ b/core/tests/coretests/src/android/provider/SettingsBackupTest.java
@@ -281,6 +281,7 @@ public class SettingsBackupTest {
                     Settings.Global.RADIO_NFC,
                     Settings.Global.RADIO_WIFI,
                     Settings.Global.RADIO_WIMAX,
+                    Settings.Global.RECOMMENDED_NETWORK_EVALUATOR_CACHE_EXPIRY_MS,
                     Settings.Global.READ_EXTERNAL_STORAGE_ENFORCED_DEFAULT,
                     Settings.Global.REQUIRE_PASSWORD_TO_DECRYPT,
                     Settings.Global.RETAIL_DEMO_MODE_CONSTANTS,