diff --git a/collector/pg_replication_slots.go b/collector/replication_slots.go
similarity index 74%
rename from collector/pg_replication_slots.go
rename to collector/replication_slots.go
index c21d7f41..e1c2f0a8 100644
--- a/collector/pg_replication_slots.go
+++ b/collector/replication_slots.go
@@ -44,16 +44,22 @@ var pgReplicationSlot = map[string]*prometheus.Desc{
 		"last lsn confirmed flushed to the replication slot",
 		[]string{"slot_name"}, nil,
 	),
+	"is_active": prometheus.NewDesc(
+		"pg_replication_slot_is_active",
+		"last lsn confirmed flushed to the replication slot",
+		[]string{"slot_name"}, nil,
+	),
 }
 
 func (PGReplicationSlotCollector) Update(ctx context.Context, db *sql.DB, ch chan<- prometheus.Metric) error {
 	rows, err := db.QueryContext(ctx,
 		`SELECT
 			slot_name,
-			pg_current_wal_lsn() AS current_wal_lsn,
-			confirmed_flush_lsn
-			FROM
-		pg_replication_slots;`)
+			pg_current_wal_lsn() - '0/0' AS current_wal_lsn,
+			coalesce(confirmed_flush_lsn, '0/0') - '0/0',
+			active
+		FROM
+			pg_replication_slots;`)
 	if err != nil {
 		return err
 	}
@@ -63,7 +69,8 @@ func (PGReplicationSlotCollector) Update(ctx context.Context, db *sql.DB, ch cha
 		var slot_name string
 		var wal_lsn int64
 		var flush_lsn int64
-		if err := rows.Scan(&slot_name, &wal_lsn, &flush_lsn); err != nil {
+		var is_active int
+		if err := rows.Scan(&slot_name, &wal_lsn, &flush_lsn, &is_active); err != nil {
 			return err
 		}
 
@@ -71,9 +78,15 @@ func (PGReplicationSlotCollector) Update(ctx context.Context, db *sql.DB, ch cha
 			pgReplicationSlot["current_wal_lsn"],
 			prometheus.GaugeValue, float64(wal_lsn), slot_name,
 		)
+		if (is_active == 1) {
+			ch <- prometheus.MustNewConstMetric(
+				pgReplicationSlot["confirmed_flush_lsn"],
+				prometheus.GaugeValue, float64(flush_lsn), slot_name,
+			)
+		}
 		ch <- prometheus.MustNewConstMetric(
-			pgReplicationSlot["confirmed_flush_lsn"],
-			prometheus.GaugeValue, float64(flush_lsn), slot_name,
+			pgReplicationSlot["is_active"],
+			prometheus.GaugeValue, int(flush_lsn), slot_name,
 		)
 	}
 	if err := rows.Err(); err != nil {