diff --git a/core/java/android/net/NetworkIdentity.java b/core/java/android/net/NetworkIdentity.java
index fd118f340119a..ce2de8554dcc5 100644
--- a/core/java/android/net/NetworkIdentity.java
+++ b/core/java/android/net/NetworkIdentity.java
@@ -130,6 +130,7 @@ public class NetworkIdentity implements Comparable<NetworkIdentity> {
         proto.write(NetworkIdentityProto.NETWORK_ID, mNetworkId);
         proto.write(NetworkIdentityProto.ROAMING, mRoaming);
         proto.write(NetworkIdentityProto.METERED, mMetered);
+        proto.write(NetworkIdentityProto.DEFAULT_NETWORK, mDefaultNetwork);
 
         proto.end(start);
     }
diff --git a/core/proto/android/service/netstats.proto b/core/proto/android/service/netstats.proto
index 23613fdabf761..ad9191cac2e41 100644
--- a/core/proto/android/service/netstats.proto
+++ b/core/proto/android/service/netstats.proto
@@ -63,6 +63,8 @@ message NetworkIdentityProto {
     optional bool roaming = 4;
 
     optional bool metered = 5;
+
+    optional bool default_network = 6;
 }
 
 // Corresponds to NetworkStatsRecorder.