diff --git a/proto/src/system_messages.proto b/proto/src/system_messages.proto
index 5712566311d71..068707fee173a 100644
--- a/proto/src/system_messages.proto
+++ b/proto/src/system_messages.proto
@@ -234,6 +234,9 @@ message SystemMessage {
     // Package: android
     NOTE_SERIAL_CONSOLE_ENABLED = 55;
 
+    // Inform the user that the current network may not support using a randomized MAC address.
+    NOTE_NETWORK_NO_MAC_RANDOMIZATION_SUPPORT = 56;
+
     // ADD_NEW_IDS_ABOVE_THIS_LINE
     // Legacy IDs with arbitrary values appear below
     // Legacy IDs existed as stable non-conflicting constants prior to the O release