diff --git a/lib/storage/index_db.go b/lib/storage/index_db.go
index ad74c923df..fb16349849 100644
--- a/lib/storage/index_db.go
+++ b/lib/storage/index_db.go
@@ -876,7 +876,7 @@ func (is *indexSearch) searchLabelNamesWithFiltersOnDate(qt *querytracer.Tracer,
 	if filter != nil && filter.Len() <= 100e3 {
 		// It is faster to obtain label names by metricIDs from the filter
 		// instead of scanning the inverted index for the matching filters.
-		// This hould help https://github.com/VictoriaMetrics/VictoriaMetrics/issues/2978
+		// This would help https://github.com/VictoriaMetrics/VictoriaMetrics/issues/2978
 		metricIDs := filter.AppendTo(nil)
 		qt.Printf("sort %d metricIDs", len(metricIDs))
 		return is.getLabelNamesForMetricIDs(qt, metricIDs, lns, maxLabelNames)
@@ -1072,7 +1072,7 @@ func (is *indexSearch) searchLabelValuesWithFiltersOnDate(qt *querytracer.Tracer
 	if filter != nil && filter.Len() < 100e3 {
 		// It is faster to obtain label values by metricIDs from the filter
 		// instead of scanning the inverted index for the matching filters.
-		// This hould help https://github.com/VictoriaMetrics/VictoriaMetrics/issues/2978
+		// This would help https://github.com/VictoriaMetrics/VictoriaMetrics/issues/2978
 		metricIDs := filter.AppendTo(nil)
 		qt.Printf("sort %d metricIDs", len(metricIDs))
 		return is.getLabelValuesForMetricIDs(qt, lvs, labelName, metricIDs, maxLabelValues)
@@ -1135,6 +1135,9 @@ func (is *indexSearch) searchLabelValuesWithFiltersOnDate(qt *querytracer.Tracer
 }
 
 func (is *indexSearch) getLabelValuesForMetricIDs(qt *querytracer.Tracer, lvs map[string]struct{}, labelName string, metricIDs []uint64, maxLabelValues int) error {
+	if labelName == "" {
+		labelName = "__name__"
+	}
 	var mn MetricName
 	foundLabelValues := 0
 	var buf []byte