diff --git a/pkg/management/postgres/probes.go b/pkg/management/postgres/probes.go
index 6b346c6346..930e6090bc 100644
--- a/pkg/management/postgres/probes.go
+++ b/pkg/management/postgres/probes.go
@@ -594,7 +594,7 @@ type PgStatWal struct {
 	WalSync        int64
 	WalWriteTime   float64
 	WalSyncTime    float64
-	StatsReset     string
+	StatsReset     sql.NullString
 }
 
 // TryGetPgStatWAL retrieves pg_stat_wal on pg version 14 and further
diff --git a/pkg/management/postgres/webserver/metricserver/wal.go b/pkg/management/postgres/webserver/metricserver/wal.go
index f8921cb000..f293f9ffb8 100644
--- a/pkg/management/postgres/webserver/metricserver/wal.go
+++ b/pkg/management/postgres/webserver/metricserver/wal.go
@@ -50,15 +50,15 @@ func collectPGStatWAL(e *Exporter) error {
 		return err
 	}
 	walMetrics := e.Metrics.PgStatWalMetrics
-	walMetrics.WalRecords.WithLabelValues(walStat.StatsReset).Set(float64(walStat.WalRecords))
-	walMetrics.WalFpi.WithLabelValues(walStat.StatsReset).Set(float64(walStat.WalFpi))
-	walMetrics.WalBytes.WithLabelValues(walStat.StatsReset).Set(float64(walStat.WalBytes))
-	walMetrics.WALBuffersFull.WithLabelValues(walStat.StatsReset).Set(float64(walStat.WALBuffersFull))
+	walMetrics.WalRecords.WithLabelValues(walStat.StatsReset.String).Set(float64(walStat.WalRecords))
+	walMetrics.WalFpi.WithLabelValues(walStat.StatsReset.String).Set(float64(walStat.WalFpi))
+	walMetrics.WalBytes.WithLabelValues(walStat.StatsReset.String).Set(float64(walStat.WalBytes))
+	walMetrics.WALBuffersFull.WithLabelValues(walStat.StatsReset.String).Set(float64(walStat.WALBuffersFull))
 	if version, _ := e.instance.GetPgVersion(); version.Major < 18 {
-		walMetrics.WalWrite.WithLabelValues(walStat.StatsReset).Set(float64(walStat.WalWrite))
-		walMetrics.WalSync.WithLabelValues(walStat.StatsReset).Set(float64(walStat.WalSync))
-		walMetrics.WalWriteTime.WithLabelValues(walStat.StatsReset).Set(walStat.WalWriteTime)
-		walMetrics.WalSyncTime.WithLabelValues(walStat.StatsReset).Set(walStat.WalSyncTime)
+		walMetrics.WalWrite.WithLabelValues(walStat.StatsReset.String).Set(float64(walStat.WalWrite))
+		walMetrics.WalSync.WithLabelValues(walStat.StatsReset.String).Set(float64(walStat.WalSync))
+		walMetrics.WalWriteTime.WithLabelValues(walStat.StatsReset.String).Set(walStat.WalWriteTime)
+		walMetrics.WalSyncTime.WithLabelValues(walStat.StatsReset.String).Set(walStat.WalSyncTime)
 	}
 
 	return nil