diff --git a/metrics/prometheus/collector.go b/metrics/prometheus/collector.go
index a6cbcd64a7..58bd8ffb7f 100644
--- a/metrics/prometheus/collector.go
+++ b/metrics/prometheus/collector.go
@@ -114,6 +114,7 @@ func (c *collector) addTimer(name string, m metrics.TimerSnapshot) {
 	pv := []float64{0.5, 0.75, 0.95, 0.99, 0.999, 0.9999}
 	ps := m.Percentiles(pv)
 	c.writeSummaryCounter(name, m.Count())
+	c.writeSummaryCounter(mutateKey(name+"_total"), m.Total().Nanoseconds())
 	c.buff.WriteString(fmt.Sprintf(typeSummaryTpl, mutateKey(name)))
 	for i := range pv {
 		c.writeSummaryPercentile(name, strconv.FormatFloat(pv[i], 'f', -1, 64), ps[i])
diff --git a/metrics/prometheus/testdata/prometheus.want b/metrics/prometheus/testdata/prometheus.want
index 861c5f5cf0..97e51634d6 100644
--- a/metrics/prometheus/testdata/prometheus.want
+++ b/metrics/prometheus/testdata/prometheus.want
@@ -60,6 +60,9 @@ test_resetting_timer {quantile="0.99"} 1.2e+08
 # TYPE test_timer_count counter
 test_timer_count 6
 
+# TYPE test_timer_total_count counter
+test_timer_total_count 230000000
+
 # TYPE test_timer summary
 test_timer {quantile="0.5"} 2.25e+07
 test_timer {quantile="0.75"} 4.8e+07