diff --git a/pkg/receive/multitsdb_test.go b/pkg/receive/multitsdb_test.go
index ed8a7efba2..a89e24c2c5 100644
--- a/pkg/receive/multitsdb_test.go
+++ b/pkg/receive/multitsdb_test.go
@@ -166,11 +166,11 @@ func TestMultiTSDB(t *testing.T) {
 var (
 	expectedFooResp = &storepb.Series{
 		Labels: []labelpb.ZLabel{{Name: "a", Value: "1"}, {Name: "b", Value: "2"}, {Name: "replica", Value: "01"}, {Name: "tenant_id", Value: "foo"}},
-		Chunks: []storepb.AggrChunk{{MinTime: 1, MaxTime: 3, Raw: &storepb.Chunk{Data: []byte("\000\003\002@\003L\235\2354X\315\001\330\r\257Mui\251\327:U")}}},
+		Chunks: []storepb.AggrChunk{{MinTime: 1, MaxTime: 3, Raw: &storepb.Chunk{Data: []byte("\000\003\002@\003L\235\2354X\315\001\330\r\257Mui\251\327:U"), Hash: 9768694233508509040}}},
 	}
 	expectedBarResp = &storepb.Series{
 		Labels: []labelpb.ZLabel{{Name: "a", Value: "1"}, {Name: "b", Value: "2"}, {Name: "replica", Value: "01"}, {Name: "tenant_id", Value: "bar"}},
-		Chunks: []storepb.AggrChunk{{MinTime: 1, MaxTime: 3, Raw: &storepb.Chunk{Data: []byte("\000\003\002@4i\223\263\246\213\032\001\330\035i\337\322\352\323S\256t\270")}}},
+		Chunks: []storepb.AggrChunk{{MinTime: 1, MaxTime: 3, Raw: &storepb.Chunk{Data: []byte("\000\003\002@4i\223\263\246\213\032\001\330\035i\337\322\352\323S\256t\270"), Hash: 2304287992246504442}}},
 	}
 )
 
diff --git a/pkg/store/proxy_heap.go b/pkg/store/proxy_heap.go
index 822633b6a7..558ffcb69b 100644
--- a/pkg/store/proxy_heap.go
+++ b/pkg/store/proxy_heap.go
@@ -21,6 +21,7 @@ import (
 	"github.com/pkg/errors"
 	"github.com/prometheus/client_golang/prometheus"
 	"github.com/prometheus/prometheus/model/labels"
+
 	"github.com/thanos-io/thanos/pkg/store/labelpb"
 	"github.com/thanos-io/thanos/pkg/store/storepb"
 	"github.com/thanos-io/thanos/pkg/tracing"
@@ -130,15 +131,16 @@ func (d *dedupResponseHeap) At() *storepb.SeriesResponse {
 				if field == nil {
 					continue
 				}
-				h := xxhash.Sum64(field.Data)
+				hash := field.Hash
+				if hash == 0 {
+					hash = xxhash.Sum64(field.Data)
+				}
 
-				if _, ok := chunkDedupMap[h]; !ok {
+				if _, ok := chunkDedupMap[hash]; !ok {
 					chk := chk
-
-					chunkDedupMap[h] = &chk
+					chunkDedupMap[hash] = &chk
 				}
 			}
-
 		}
 	}
 
diff --git a/pkg/store/proxy_test.go b/pkg/store/proxy_test.go
index ad0939687f..8a997907e4 100644
--- a/pkg/store/proxy_test.go
+++ b/pkg/store/proxy_test.go
@@ -15,6 +15,7 @@ import (
 	"testing"
 	"time"
 
+	"github.com/cespare/xxhash/v2"
 	"github.com/go-kit/log"
 	"github.com/gogo/protobuf/proto"
 	"github.com/gogo/protobuf/types"
@@ -2079,6 +2080,7 @@ func TestDedupRespHeap_Deduplication(t *testing.T) {
 								{
 									Raw: &storepb.Chunk{
 										Type: storepb.Chunk_XOR,
+										Hash: xxhash.Sum64([]byte(`abcdefgh`)),
 										Data: []byte(`abcdefgh`),
 									},
 								},