diff --git a/metrics/metrics.go b/metrics/metrics.go
index 9906bb8ad..da2cdbc53 100644
--- a/metrics/metrics.go
+++ b/metrics/metrics.go
@@ -29,7 +29,7 @@ import (
 )
 
 // MetricsEnabledFlag is the CLI flag name to use to enable metrics collections.
-var MetricsEnabledFlag = "metrics"
+const MetricsEnabledFlag = "metrics"
 
 // Enabled is the flag specifying if metrics are enable or not.
 var Enabled = false