diff --git a/phpfpm/exporter.go b/phpfpm/exporter.go
index 6069c97..8cca9f2 100644
--- a/phpfpm/exporter.go
+++ b/phpfpm/exporter.go
@@ -197,7 +197,7 @@ func (e *Exporter) Collect(ch chan<- prometheus.Metric) {
 		}
 
 		ch <- prometheus.MustNewConstMetric(e.up, prometheus.GaugeValue, 1, pool.Name)
-		ch <- prometheus.MustNewConstMetric(e.startSince, prometheus.CounterValue, float64(pool.AcceptedConnections), pool.Name)
+		ch <- prometheus.MustNewConstMetric(e.startSince, prometheus.CounterValue, float64(pool.StartSince), pool.Name)
 		ch <- prometheus.MustNewConstMetric(e.acceptedConnections, prometheus.CounterValue, float64(pool.AcceptedConnections), pool.Name)
 		ch <- prometheus.MustNewConstMetric(e.listenQueue, prometheus.GaugeValue, float64(pool.ListenQueue), pool.Name)
 		ch <- prometheus.MustNewConstMetric(e.maxListenQueue, prometheus.CounterValue, float64(pool.MaxListenQueue), pool.Name)