diff --git a/storage/metric/interface.go b/storage/metric/interface.go
index 379988c07..a3c58ceb8 100644
--- a/storage/metric/interface.go
+++ b/storage/metric/interface.go
@@ -43,7 +43,7 @@ type MetricPersistence interface {
 	GetMetricForFingerprint(model.Fingerprint) (*model.Metric, error)
 
 	GetValueAtTime(model.Metric, time.Time, StalenessPolicy) (*model.Sample, error)
-	GetBoundaryValues(*model.Metric, *model.Interval, *StalenessPolicy) (*model.Sample, *model.Sample, error)
+	GetBoundaryValues(model.Metric, model.Interval, StalenessPolicy) (*model.Sample, *model.Sample, error)
 	GetRangeValues(*model.Metric, *model.Interval, *StalenessPolicy) (*model.SampleSet, error)
 
 	GetAllMetricNames() ([]string, error)
diff --git a/storage/metric/leveldb/reading.go b/storage/metric/leveldb/reading.go
index 0be23a20e..a0a0952aa 100644
--- a/storage/metric/leveldb/reading.go
+++ b/storage/metric/leveldb/reading.go
@@ -290,7 +290,7 @@ func (l *LevelDBMetricPersistence) GetMetricForFingerprint(f model.Fingerprint)
 	return
 }
 
-func (l *LevelDBMetricPersistence) GetBoundaryValues(m *model.Metric, i *model.Interval, s *metric.StalenessPolicy) (open *model.Sample, end *model.Sample, err error) {
+func (l *LevelDBMetricPersistence) GetBoundaryValues(m model.Metric, i model.Interval, s metric.StalenessPolicy) (open *model.Sample, end *model.Sample, err error) {
 	begin := time.Now()
 
 	defer func() {
@@ -300,14 +300,14 @@ func (l *LevelDBMetricPersistence) GetBoundaryValues(m *model.Metric, i *model.I
 	}()
 
 	// XXX: Maybe we will want to emit incomplete sets?
-	open, err = l.GetValueAtTime(*m, i.OldestInclusive, *s)
+	open, err = l.GetValueAtTime(m, i.OldestInclusive, s)
 	if err != nil {
 		return
 	} else if open == nil {
 		return
 	}
 
-	end, err = l.GetValueAtTime(*m, i.NewestInclusive, *s)
+	end, err = l.GetValueAtTime(m, i.NewestInclusive, s)
 	if err != nil {
 		return
 	} else if end == nil {
diff --git a/storage/metric/leveldb/rule_integration_test.go b/storage/metric/leveldb/rule_integration_test.go
index 9b25a4762..14beb6884 100644
--- a/storage/metric/leveldb/rule_integration_test.go
+++ b/storage/metric/leveldb/rule_integration_test.go
@@ -1058,7 +1058,7 @@ var testGetBoundaryValues = func(t test.Tester) {
 					DeltaAllowance: input.staleness,
 				}
 
-				openValue, endValue, err := persistence.GetBoundaryValues(&m, &interval, &p)
+				openValue, endValue, err := persistence.GetBoundaryValues(m, interval, p)
 				if err != nil {
 					t.Errorf("%d.%d(%s). Could not query for value: %q\n", i, j, behavior.name, err)
 				}