diff --git a/pkg/syslog-ng-ctl/stats_prometheus.go b/pkg/syslog-ng-ctl/stats_prometheus.go
index 28150a9..e46bac1 100644
--- a/pkg/syslog-ng-ctl/stats_prometheus.go
+++ b/pkg/syslog-ng-ctl/stats_prometheus.go
@@ -129,9 +129,9 @@ func transformEventDelayMetric(delayMetric *io_prometheus_client.MetricFamily, d
 		delayMetric := m
 
 		if d, ok := delayMetricAgeByLabel[fmt.Sprint(m.Label)]; ok {
-			delayMetricAge := d.GetGauge().GetValue()
+			delayMetricAge := int(d.GetGauge().GetValue())
 
-			lastDelaySampleTS := now.Add(time.Duration(-delayMetricAge * float64(time.Second)))
+			lastDelaySampleTS := now.Add(time.Duration(-delayMetricAge) * time.Second)
 			if lastDelaySampleTS.After(lastMetricQueryTime) {
 				timestampMs := timestamp.FromTime(lastDelaySampleTS)
 				transformedMetric = append(transformedMetric,