diff --git a/cmd/postgres_exporter/postgres_exporter.go b/cmd/postgres_exporter/postgres_exporter.go
index 45195339..7ecab7c2 100644
--- a/cmd/postgres_exporter/postgres_exporter.go
+++ b/cmd/postgres_exporter/postgres_exporter.go
@@ -242,6 +242,7 @@ var builtinMetricMaps = map[string]map[string]ColumnMapping{
 		"restart_lsn":              {DISCARD, "The address (LSN) of oldest WAL which still might be required by the consumer of this slot and thus won't be automatically removed during checkpoints", nil, nil},
 		"pg_current_xlog_location": {DISCARD, "pg_current_xlog_location", nil, nil},
 		"pg_current_wal_lsn":       {DISCARD, "pg_current_xlog_location", nil, semver.MustParseRange(">=10.0.0")},
+		"pg_current_wal_lsn_bytes": {GAUGE, "WAL position in bytes", nil, semver.MustParseRange(">=10.0.0")},
 		"pg_xlog_location_diff":    {GAUGE, "Lag in bytes between master and slave", nil, semver.MustParseRange(">=9.2.0 <10.0.0")},
 		"pg_wal_lsn_diff":          {GAUGE, "Lag in bytes between master and slave", nil, semver.MustParseRange(">=10.0.0")},
 		"confirmed_flush_lsn":      {DISCARD, "LSN position a consumer of a slot has confirmed flushing the data received", nil, nil},
@@ -299,6 +300,7 @@ var queryOverrides = map[string][]OverrideQuery{
 			`
 			SELECT *,
 				(case pg_is_in_recovery() when 't' then null else pg_current_wal_lsn() end) AS pg_current_wal_lsn,
+				(case pg_is_in_recovery() when 't' then null else pg_wal_lsn_diff(pg_current_wal_lsn(), pg_lsn('0/0'))::float end) AS pg_current_wal_lsn_bytes,
 				(case pg_is_in_recovery() when 't' then null else pg_wal_lsn_diff(pg_current_wal_lsn(), replay_lsn)::float end) AS pg_wal_lsn_diff
 			FROM pg_stat_replication
 			`,