diff --git a/tasmota/xsns_91_prometheus.ino b/tasmota/xsns_91_prometheus.ino
index 2a361b550..9e29afe75 100644
--- a/tasmota/xsns_91_prometheus.ino
+++ b/tasmota/xsns_91_prometheus.ino
@@ -37,6 +37,8 @@ void HandleMetrics(void)
 
   char parameter[FLOATSZ];
 
+  WSContentSend_P(PSTR("# TYPE tasmota_uptime_seconds gauge\ntasmota_uptime_seconds %d\n"), uptime);
+
   if (!isnan(global_temperature)) {
     dtostrfd(global_temperature, Settings.flag2.temperature_resolution, parameter);
     WSContentSend_P(PSTR("# TYPE global_temperature gauge\nglobal_temperature %s\n"), parameter);