diff --git a/storage/remote/codec.go b/storage/remote/codec.go
index 041bdf10e..9b6f5a5ab 100644
--- a/storage/remote/codec.go
+++ b/storage/remote/codec.go
@@ -528,7 +528,7 @@ func spansProtoToSpans(s []*prompb.BucketSpan) []histogram.Span {
 	return spans
 }
 
-func histogramToHistogramProto(timestamp int64, h *histogram.Histogram) prompb.Histogram {
+func HistogramToHistogramProto(timestamp int64, h *histogram.Histogram) prompb.Histogram {
 	return prompb.Histogram{
 		Count:          &prompb.Histogram_CountInt{CountInt: h.Count},
 		Sum:            h.Sum,
diff --git a/storage/remote/codec_test.go b/storage/remote/codec_test.go
index 536657733..7d1ba9b5b 100644
--- a/storage/remote/codec_test.go
+++ b/storage/remote/codec_test.go
@@ -52,7 +52,7 @@ var writeRequestFixture = &prompb.WriteRequest{
 			},
 			Samples:    []prompb.Sample{{Value: 1, Timestamp: 0}},
 			Exemplars:  []prompb.Exemplar{{Labels: []prompb.Label{{Name: "f", Value: "g"}}, Value: 1, Timestamp: 0}},
-			Histograms: []prompb.Histogram{histogramToHistogramProto(0, &testHistogram)},
+			Histograms: []prompb.Histogram{HistogramToHistogramProto(0, &testHistogram)},
 		},
 		{
 			Labels: []prompb.Label{
@@ -64,7 +64,7 @@ var writeRequestFixture = &prompb.WriteRequest{
 			},
 			Samples:    []prompb.Sample{{Value: 2, Timestamp: 1}},
 			Exemplars:  []prompb.Exemplar{{Labels: []prompb.Label{{Name: "h", Value: "i"}}, Value: 2, Timestamp: 1}},
-			Histograms: []prompb.Histogram{histogramToHistogramProto(1, &testHistogram)},
+			Histograms: []prompb.Histogram{HistogramToHistogramProto(1, &testHistogram)},
 		},
 	},
 }
diff --git a/storage/remote/queue_manager.go b/storage/remote/queue_manager.go
index faf27257a..bd5fe9398 100644
--- a/storage/remote/queue_manager.go
+++ b/storage/remote/queue_manager.go
@@ -1397,7 +1397,7 @@ func (s *shards) populateTimeSeries(batch []timeSeries, pendingData []prompb.Tim
 			})
 			nPendingExemplars++
 		case tHistogram:
-			pendingData[nPending].Histograms = append(pendingData[nPending].Histograms, histogramToHistogramProto(d.timestamp, d.histogram))
+			pendingData[nPending].Histograms = append(pendingData[nPending].Histograms, HistogramToHistogramProto(d.timestamp, d.histogram))
 			nPendingHistograms++
 		}
 	}
diff --git a/storage/remote/queue_manager_test.go b/storage/remote/queue_manager_test.go
index f6259862e..764e688b3 100644
--- a/storage/remote/queue_manager_test.go
+++ b/storage/remote/queue_manager_test.go
@@ -701,7 +701,7 @@ func (c *TestWriteClient) expectHistograms(hh []record.RefHistogram, series []re
 
 	for _, h := range hh {
 		seriesName := getSeriesNameFromRef(series[h.Ref])
-		c.expectedHistograms[seriesName] = append(c.expectedHistograms[seriesName], histogramToHistogramProto(h.T, h.H))
+		c.expectedHistograms[seriesName] = append(c.expectedHistograms[seriesName], HistogramToHistogramProto(h.T, h.H))
 	}
 	c.wg.Add(len(hh))
 }
diff --git a/storage/remote/write_handler_test.go b/storage/remote/write_handler_test.go
index 7daa56d02..49cec25da 100644
--- a/storage/remote/write_handler_test.go
+++ b/storage/remote/write_handler_test.go
@@ -123,7 +123,7 @@ func TestOutOfOrderExemplar(t *testing.T) {
 func TestOutOfOrderHistogram(t *testing.T) {
 	buf, _, err := buildWriteRequest([]prompb.TimeSeries{{
 		Labels:     []prompb.Label{{Name: "__name__", Value: "test_metric"}},
-		Histograms: []prompb.Histogram{histogramToHistogramProto(0, &testHistogram)},
+		Histograms: []prompb.Histogram{HistogramToHistogramProto(0, &testHistogram)},
 	}}, nil, nil, nil)
 	require.NoError(t, err)