diff --git a/victoriametrics.go b/victoriametrics.go
index 2884056..6f6294b 100644
--- a/victoriametrics.go
+++ b/victoriametrics.go
@@ -47,10 +47,10 @@ func (r *victoriametricsMeter) buildName(name string, labels ...string) string {
 		return meter.BuildName(name, nlabels...)
 	}
 
-	for idx := 0; idx <= len(nlabels)/2; idx += 2 {
+	for idx := 0; idx < nl; idx++ {
 		nlabels[idx] = r.opts.LabelPrefix + nlabels[idx]
+		idx++
 	}
-
 	return meter.BuildName(name, nlabels...)
 }
 
diff --git a/victoriametrics_test.go b/victoriametrics_test.go
index b5c5b82..7851516 100644
--- a/victoriametrics_test.go
+++ b/victoriametrics_test.go
@@ -14,8 +14,8 @@ import (
 func TestBuildName(t *testing.T) {
 	m := NewMeter()
 	im := m.(*victoriametricsMeter)
-	check := `micro_foo{micro_aaa="b",micro_bar="baz"}`
-	name := im.buildName("foo", "bar", "baz", "aaa", "b")
+	check := `micro_foo{micro_aaa="b",micro_bar="baz",micro_ccc="d"}`
+	name := im.buildName("foo", "bar", "baz", "aaa", "b", "ccc", "d")
 	if name != check {
 		t.Fatalf("metric name error: %s != %s", name, check)
 	}