diff --git a/packages/NetworkStack/res/values/overlayable.xml b/packages/NetworkStack/res/values/overlayable.xml
new file mode 100644
index 0000000000000..7eeeefcf87f69
--- /dev/null
+++ b/packages/NetworkStack/res/values/overlayable.xml
@@ -0,0 +1,25 @@
+<?xml version="1.0" encoding="utf-8" ?>
+<!-- Copyright (C) 2019 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.
+-->
+<resources xmlns:android="http://schemas.android.com/apk/res/android">
+    <overlayable name="NetworkStackConfig">
+        <policy type="product|system|vendor">
+            <!-- Configuration values for NetworkMonitor -->
+            <item type="string" name="config_captive_portal_http_url"/>
+            <item type="string" name="config_captive_portal_https_url"/>
+            <item type="array" name="config_captive_portal_fallback_urls"/>
+        </policy>
+    </overlayable>
+</resources>