diff --git a/cmd/syncthing/gui.go b/cmd/syncthing/gui.go
index 0dafaaf07..0c27c2137 100644
--- a/cmd/syncthing/gui.go
+++ b/cmd/syncthing/gui.go
@@ -642,6 +642,7 @@ func (s *apiSvc) getSystemStatus(w http.ResponseWriter, r *http.Request) {
 	res["cpuPercent"] = cpusum / float64(len(cpuUsagePercent)) / float64(runtime.NumCPU())
 	res["pathSeparator"] = string(filepath.Separator)
 	res["uptime"] = int(time.Since(startTime).Seconds())
+	res["startTime"] = startTime
 
 	w.Header().Set("Content-Type", "application/json; charset=utf-8")
 	json.NewEncoder(w).Encode(res)