diff --git a/proto/src/wifi.proto b/proto/src/wifi.proto
index 1bcc888db7a7..910577fcc751 100644
--- a/proto/src/wifi.proto
+++ b/proto/src/wifi.proto
@@ -2051,6 +2051,10 @@ message WifiUsabilityStats {
 
   // What event triggered WifiUsabilityStats.
   optional UsabilityStatsTriggerType trigger_type = 3;
+
+  // Firmware alert code. Only valid when the stats was triggered by a firmware
+  // alert, otherwise -1.
+  optional int32 firmware_alert_code = 4 [default = -1];
 }
 
 message DeviceMobilityStatePnoScanStats {