diff --git a/cmd/postgres_exporter/percona_exporter.go b/cmd/postgres_exporter/percona_exporter.go
index 78d4cad1..1abbc0f1 100644
--- a/cmd/postgres_exporter/percona_exporter.go
+++ b/cmd/postgres_exporter/percona_exporter.go
@@ -25,10 +25,9 @@ import (
 type MetricResolution string
 
 const (
-	DISABLED MetricResolution = ""
-	LR       MetricResolution = "lr"
-	MR       MetricResolution = "mr"
-	HR       MetricResolution = "hr"
+	LR MetricResolution = "lr"
+	MR MetricResolution = "mr"
+	HR MetricResolution = "hr"
 )
 
 var (