diff --git a/pkg/promclient/labelfilter.go b/pkg/promclient/labelfilter.go
index 08d14bb71..54a26c13b 100644
--- a/pkg/promclient/labelfilter.go
+++ b/pkg/promclient/labelfilter.go
@@ -35,6 +35,7 @@ func init() {
 	prometheus.MustRegister(
 		syncCount,
 		syncSummary,
+		filteredCount,
 	)
 }