diff --git a/meshtastic/telemetry.proto b/meshtastic/telemetry.proto
index 0eb59cd..ed48589 100644
--- a/meshtastic/telemetry.proto
+++ b/meshtastic/telemetry.proto
@@ -31,6 +31,11 @@ message DeviceMetrics {
    * Percent of airtime for transmission used within the last hour.
    */
   float air_util_tx = 4;
+
+  /*
+   * How long the device has been running since the last reboot (in seconds)
+   */
+  uint32 uptime_seconds = 5;
 }
 
 /*