diff --git a/cmd/tusd/cli/metrics.go b/cmd/tusd/cli/metrics.go
index 921d67a..058c750 100644
--- a/cmd/tusd/cli/metrics.go
+++ b/cmd/tusd/cli/metrics.go
@@ -16,7 +16,7 @@ var MetricsOpenConnections = prometheus.NewGauge(prometheus.GaugeOpts{
 
 func SetupMetrics(handler *tusd.Handler) {
 	prometheus.MustRegister(MetricsOpenConnections)
-	prometheus.MustRegister(prometheuscollector.New(handler.Metrics))
+	prometheus.MustRegister(prometheuscollector.New(&handler.Metrics))
 
 	stdout.Printf("Using %s as the metrics path.\n", Flags.MetricsPath)
 	http.Handle(Flags.MetricsPath, prometheus.Handler())
diff --git a/prometheuscollector/prometheuscollector.go b/prometheuscollector/prometheuscollector.go
index a7dc95f..caeca98 100644
--- a/prometheuscollector/prometheuscollector.go
+++ b/prometheuscollector/prometheuscollector.go
@@ -46,11 +46,11 @@ var (
 )
 
 type Collector struct {
-	metrics tusd.Metrics
+	metrics *tusd.Metrics
 }
 
 // New creates a new collector which read froms the provided Metrics struct.
-func New(metrics tusd.Metrics) Collector {
+func New(metrics *tusd.Metrics) Collector {
 	return Collector{
 		metrics: metrics,
 	}