diff --git a/core/java/android/provider/Settings.java b/core/java/android/provider/Settings.java
index 515a91c4d4223..6949e43d99912 100755
--- a/core/java/android/provider/Settings.java
+++ b/core/java/android/provider/Settings.java
@@ -7441,6 +7441,12 @@ public final class Settings {
        public static final String NETWORK_SWITCH_NOTIFICATION_RATE_LIMIT_MILLIS =
               "network_switch_notification_rate_limit_millis";
 
+       /**
+        * Whether to automatically switch away from wifi networks that lose Internet access.
+        * @hide
+        */
+       public static final String NETWORK_AVOID_BAD_WIFI = "network_avoid_bad_wifi";
+
        /**
         * Whether Wifi display is enabled/disabled
         * 0=disabled. 1=enabled.
diff --git a/core/res/res/values/config.xml b/core/res/res/values/config.xml
index b80b0a70a0368..3dbcdafcc99b6 100644
--- a/core/res/res/values/config.xml
+++ b/core/res/res/values/config.xml
@@ -275,6 +275,11 @@
     <string-array translatable="false" name="config_networkNotifySwitches">
     </string-array>
 
+    <!-- Whether the device should automatically switch away from Wi-Fi networks that lose
+         Internet access. Actual device behaviour is controlled by
+         Settings.Global.NETWORK_AVOID_BAD_WIFI. This is the default value of that setting. -->
+    <integer translatable="false" name="config_networkAvoidBadWifi">1</integer>
+
     <!-- List of regexpressions describing the interface (if any) that represent tetherable
          USB interfaces.  If the device doesn't want to support tethering over USB this should
          be empty.  An example would be "usb.*" -->
diff --git a/core/res/res/values/symbols.xml b/core/res/res/values/symbols.xml
index 924d338091240..def40dbcbd041 100644
--- a/core/res/res/values/symbols.xml
+++ b/core/res/res/values/symbols.xml
@@ -1746,6 +1746,7 @@
   <java-symbol type="integer" name="config_networkTransitionTimeout" />
   <java-symbol type="integer" name="config_networkNotifySwitchType" />
   <java-symbol type="array" name="config_networkNotifySwitches" />
+  <java-symbol type="integer" name="config_networkAvoidBadWifi" />
   <java-symbol type="integer" name="config_notificationsBatteryFullARGB" />
   <java-symbol type="integer" name="config_notificationsBatteryLedOff" />
   <java-symbol type="integer" name="config_notificationsBatteryLedOn" />
diff --git a/services/core/java/com/android/server/ConnectivityService.java b/services/core/java/com/android/server/ConnectivityService.java
index 5d0508c56b35b..4c30dc2661ec8 100644
--- a/services/core/java/com/android/server/ConnectivityService.java
+++ b/services/core/java/com/android/server/ConnectivityService.java
@@ -2704,6 +2704,15 @@ public class ConnectivityService extends IConnectivityManager.Stub
                 PROMPT_UNVALIDATED_DELAY_MS);
     }
 
+    @VisibleForTesting
+    public boolean avoidBadWifi() {
+        int defaultAvoidBadWifi =
+            mContext.getResources().getInteger(R.integer.config_networkAvoidBadWifi);
+        int avoid = Settings.Global.getInt(mContext.getContentResolver(),
+            Settings.Global.NETWORK_AVOID_BAD_WIFI, defaultAvoidBadWifi);
+        return avoid == 1;
+    }
+
     private void handlePromptUnvalidated(Network network) {
         if (VDBG) log("handlePromptUnvalidated " + network);
         NetworkAgentInfo nai = getNetworkAgentInfoForNetwork(network);
diff --git a/services/core/java/com/android/server/connectivity/NetworkAgentInfo.java b/services/core/java/com/android/server/connectivity/NetworkAgentInfo.java
index 780be3c4610fc..3503eacb07354 100644
--- a/services/core/java/com/android/server/connectivity/NetworkAgentInfo.java
+++ b/services/core/java/com/android/server/connectivity/NetworkAgentInfo.java
@@ -113,6 +113,7 @@ import java.util.TreeSet;
 // a NetworkRequest, ConnectivityService will cancel the future disconnection of the NetworkAgent's
 // AsyncChannel, and the network is no longer considered "lingering".
 public class NetworkAgentInfo implements Comparable<NetworkAgentInfo> {
+
     public NetworkInfo networkInfo;
     // This Network object should always be used if possible, so as to encourage reuse of the
     // enclosed socket factory and connection pool.  Avoid creating other Network objects.
@@ -354,13 +355,20 @@ public class NetworkAgentInfo implements Comparable<NetworkAgentInfo> {
         }
 
         int score = currentScore;
-        if (!lastValidated && !pretendValidated) {
+        if (!lastValidated && !pretendValidated && !ignoreWifiUnvalidationPenalty()) {
             score -= UNVALIDATED_SCORE_PENALTY;
         }
         if (score < 0) score = 0;
         return score;
     }
 
+    // Return true on devices configured to ignore score penalty for wifi networks
+    // that become unvalidated (b/31075769).
+    private boolean ignoreWifiUnvalidationPenalty() {
+        boolean isWifi = networkCapabilities.hasTransport(NetworkCapabilities.TRANSPORT_WIFI);
+        return isWifi && !mConnService.avoidBadWifi() && everValidated;
+    }
+
     // Get the current score for this Network.  This may be modified from what the
     // NetworkAgent sent, as it has modifiers applied to it.
     public int getCurrentScore() {