diff --git a/cmd/mango/mango.go b/cmd/mango/mango.go
index 9a71877..bf908e9 100644
--- a/cmd/mango/mango.go
+++ b/cmd/mango/mango.go
@@ -481,7 +481,7 @@ func main() {
 	}
 
 	// update runtime info metric
-	metricMangoRuntimeInfoLabels["log_level"] = strings.ToLower(logLevel.Level().String())
+	metricMangoRuntimeInfoLabels["log_level"] = logLevelFlagVal
 	metricMangoRuntimeInfo.With(metricMangoRuntimeInfoLabels).Set(1)
 
 	// parse log output format from flag