diff --git a/cmd/postgres_exporter/postgres_exporter.go b/cmd/postgres_exporter/postgres_exporter.go
index f27885c92..90bc9aceb 100644
--- a/cmd/postgres_exporter/postgres_exporter.go
+++ b/cmd/postgres_exporter/postgres_exporter.go
@@ -282,12 +282,12 @@ var builtinMetricMaps = map[string]intermediateMetricMap{
 	},
 	"pg_stat_activity": {
 		map[string]ColumnMapping{
-			"datname":         {LABEL, "Name of this database", nil, nil},
-			"state":           {LABEL, "connection state", nil, semver.MustParseRange(">=9.2.0")},
+			"datname":          {LABEL, "Name of this database", nil, nil},
+			"state":            {LABEL, "connection state", nil, semver.MustParseRange(">=9.2.0")},
 			"usename":          {LABEL, "connection usename", nil, nil},
 			"application_name": {LABEL, "connection application_name", nil, nil},
-			"count":           {GAUGE, "number of connections in this state", nil, nil},
-			"max_tx_duration": {GAUGE, "max duration in seconds any active transaction has been running", nil, nil},
+			"count":            {GAUGE, "number of connections in this state", nil, nil},
+			"max_tx_duration":  {GAUGE, "max duration in seconds any active transaction has been running", nil, nil},
 		},
 		true,
 		0,