diff --git a/metrics/default_label_strategy.go b/metrics/default_label_strategy.go
index 01fdb61..583b5ea 100644
--- a/metrics/default_label_strategy.go
+++ b/metrics/default_label_strategy.go
@@ -7,11 +7,11 @@ import (
 type DefaultLabelStrategy struct {
 }
 
-func (*DefaultLabelStrategy) labelNames() []string {
+func (*DefaultLabelStrategy) LabelNames() []string {
 	return []string{"name", "proto", "ip_version"}
 }
 
-func (*DefaultLabelStrategy) labelValues(p *protocol.Protocol) []string {
+func (*DefaultLabelStrategy) LabelValues(p *protocol.Protocol) []string {
 	return []string{p.Name, protoString(p), p.IpVersion}
 }
 
diff --git a/metrics/generic_exporter.go b/metrics/generic_exporter.go
index b8488cf..188801b 100644
--- a/metrics/generic_exporter.go
+++ b/metrics/generic_exporter.go
@@ -43,7 +43,7 @@ func NewGenericProtocolMetricExporter(prefix string, newNaming bool, labelStrate
 }
 
 func (m *GenericProtocolMetricExporter) initDesc(prefix string, newNaming bool) {
-	labels := m.labelStrategy.labelNames()
+	labels := m.labelStrategy.LabelNames()
 	m.upDesc = prometheus.NewDesc(prefix+"_up", "Protocol is up", labels, nil)
 
 	if newNaming {
@@ -111,7 +111,7 @@ func (m *GenericProtocolMetricExporter) Describe(ch chan<- *prometheus.Desc) {
 }
 
 func (m *GenericProtocolMetricExporter) Export(p *protocol.Protocol, ch chan<- prometheus.Metric) {
-	l := m.labelStrategy.labelValues(p)
+	l := m.labelStrategy.LabelValues(p)
 	ch <- prometheus.MustNewConstMetric(m.upDesc, prometheus.GaugeValue, float64(p.Up), l...)
 	ch <- prometheus.MustNewConstMetric(m.importCountDesc, prometheus.GaugeValue, float64(p.Imported), l...)
 	ch <- prometheus.MustNewConstMetric(m.exportCountDesc, prometheus.GaugeValue, float64(p.Exported), l...)
diff --git a/metrics/label_strategy.go b/metrics/label_strategy.go
index 5187244..f0fb358 100644
--- a/metrics/label_strategy.go
+++ b/metrics/label_strategy.go
@@ -3,6 +3,6 @@ package metrics
 import "github.com/czerwonk/bird_exporter/protocol"
 
 type LabelStrategy interface {
-	labelNames() []string
-	labelValues(p *protocol.Protocol) []string
+	LabelNames() []string
+	LabelValues(p *protocol.Protocol) []string
 }
diff --git a/metrics/legacy_label_strategy.go b/metrics/legacy_label_strategy.go
index 1fe4af5..c33bbfa 100644
--- a/metrics/legacy_label_strategy.go
+++ b/metrics/legacy_label_strategy.go
@@ -5,10 +5,10 @@ import "github.com/czerwonk/bird_exporter/protocol"
 type LegacyLabelStrategy struct {
 }
 
-func (*LegacyLabelStrategy) labelNames() []string {
+func (*LegacyLabelStrategy) LabelNames() []string {
 	return []string{"name"}
 }
 
-func (*LegacyLabelStrategy) labelValues(p *protocol.Protocol) []string {
+func (*LegacyLabelStrategy) LabelValues(p *protocol.Protocol) []string {
 	return []string{p.Name}
 }