diff --git a/pkg/loki/modules.go b/pkg/loki/modules.go
index ea8446355205d..e71b47b948a77 100644
--- a/pkg/loki/modules.go
+++ b/pkg/loki/modules.go
@@ -812,6 +812,7 @@ func (t *Loki) initRuler() (_ services.Service, err error) {
 func (t *Loki) initMemberlistKV() (services.Service, error) {
 	reg := prometheus.DefaultRegisterer
 
+	t.Cfg.MemberlistKV.MetricsNamespace = "loki"
 	t.Cfg.MemberlistKV.MetricsRegisterer = reg
 	t.Cfg.MemberlistKV.Codecs = []codec.Codec{
 		ring.GetCodec(),