diff --git a/manifest/ocischema/index.go b/manifest/ocischema/index.go
index 3ae824f40..834b02ab6 100644
--- a/manifest/ocischema/index.go
+++ b/manifest/ocischema/index.go
@@ -37,7 +37,12 @@ func init() {
 		}
 
 		dgst := digest.FromBytes(b)
-		return m, distribution.Descriptor{Digest: dgst, Size: int64(len(b)), MediaType: v1.MediaTypeImageIndex}, err
+		return m, distribution.Descriptor{
+			MediaType:   v1.MediaTypeImageIndex,
+			Digest:      dgst,
+			Size:        int64(len(b)),
+			Annotations: m.Annotations,
+		}, err
 	}
 	err := distribution.RegisterManifestSchema(v1.MediaTypeImageIndex, imageIndexFunc)
 	if err != nil {
diff --git a/manifest/ocischema/index_test.go b/manifest/ocischema/index_test.go
index cb07bb17a..4cfe7b65f 100644
--- a/manifest/ocischema/index_test.go
+++ b/manifest/ocischema/index_test.go
@@ -8,6 +8,7 @@ import (
 
 	"github.com/distribution/distribution/v3"
 	"github.com/distribution/distribution/v3/manifest/schema2"
+	"github.com/opencontainers/go-digest"
 	v1 "github.com/opencontainers/image-spec/specs-go/v1"
 )
 
@@ -134,6 +135,30 @@ func TestOCIImageIndex(t *testing.T) {
 	}
 }
 
+func TestOCIManifestIndexUnmarshal(t *testing.T) {
+	_, descriptor, err := distribution.UnmarshalManifest(v1.MediaTypeImageIndex, []byte(expectedOCIImageIndexSerialization))
+	if err != nil {
+		t.Fatalf("unmarshal manifest index failed: %v", err)
+	}
+	_, deserialized := makeTestOCIImageIndex(t, v1.MediaTypeImageIndex)
+
+	if !reflect.DeepEqual(descriptor.Annotations, deserialized.Annotations) {
+		t.Fatalf("manifest index annotation not equal:\nexpected:\n%v\nactual:\n%v\n", deserialized.Annotations, descriptor.Annotations)
+	}
+	if len(descriptor.Annotations) != 2 {
+		t.Fatalf("manifest index annotation length should be 2")
+	}
+	if descriptor.Size != int64(len([]byte(expectedOCIImageIndexSerialization))) {
+		t.Fatalf("manifest index size is not correct:\nexpected:\n%d\nactual:\n%v\n", int64(len([]byte(expectedOCIImageIndexSerialization))), descriptor.Size)
+	}
+	if descriptor.Digest.String() != digest.FromBytes([]byte(expectedOCIImageIndexSerialization)).String() {
+		t.Fatalf("manifest index digest is not correct:\nexpected:\n%s\nactual:\n%s\n", digest.FromBytes([]byte(expectedOCIImageIndexSerialization)), descriptor.Digest)
+	}
+	if descriptor.MediaType != v1.MediaTypeImageIndex {
+		t.Fatalf("manifest index media type is not correct:\nexpected:\n%s\nactual:\n%s\n", v1.MediaTypeImageManifest, descriptor.MediaType)
+	}
+}
+
 func indexMediaTypeTest(contentType string, mediaType string, shouldError bool) func(*testing.T) {
 	return func(t *testing.T) {
 		var m *DeserializedImageIndex
diff --git a/manifest/ocischema/manifest.go b/manifest/ocischema/manifest.go
index 973cd64ae..ab793afc9 100644
--- a/manifest/ocischema/manifest.go
+++ b/manifest/ocischema/manifest.go
@@ -30,7 +30,12 @@ func init() {
 		}
 
 		dgst := digest.FromBytes(b)
-		return m, distribution.Descriptor{Digest: dgst, Size: int64(len(b)), MediaType: v1.MediaTypeImageManifest}, err
+		return m, distribution.Descriptor{
+			MediaType:   v1.MediaTypeImageManifest,
+			Digest:      dgst,
+			Size:        int64(len(b)),
+			Annotations: m.Annotations,
+		}, err
 	}
 	err := distribution.RegisterManifestSchema(v1.MediaTypeImageManifest, ocischemaFunc)
 	if err != nil {
diff --git a/manifest/ocischema/manifest_test.go b/manifest/ocischema/manifest_test.go
index 7cde85a31..ca6d45dbe 100644
--- a/manifest/ocischema/manifest_test.go
+++ b/manifest/ocischema/manifest_test.go
@@ -10,6 +10,7 @@ import (
 	"github.com/distribution/distribution/v3/manifest"
 	"github.com/distribution/distribution/v3/manifest/manifestlist"
 
+	"github.com/opencontainers/go-digest"
 	v1 "github.com/opencontainers/image-spec/specs-go/v1"
 )
 
@@ -142,6 +143,35 @@ func TestManifest(t *testing.T) {
 	}
 }
 
+func TestManifestUnmarshal(t *testing.T) {
+	_, descriptor, err := distribution.UnmarshalManifest(v1.MediaTypeImageManifest, []byte(expectedManifestSerialization))
+	if err != nil {
+		t.Fatalf("unmarshal manifest failed: %v", err)
+	}
+	mfst := makeTestManifest(v1.MediaTypeImageManifest)
+
+	deserialized, err := FromStruct(mfst)
+	if err != nil {
+		t.Fatalf("error creating DeserializedManifest: %v", err)
+	}
+
+	if !reflect.DeepEqual(descriptor.Annotations, deserialized.Annotations) {
+		t.Fatalf("manifest annotation not equal:\nexpected:\n%v\nactual:\n%v\n", deserialized.Annotations, descriptor.Annotations)
+	}
+	if len(descriptor.Annotations) != 1 {
+		t.Fatalf("manifest index annotation length should be 1")
+	}
+	if descriptor.Size != int64(len([]byte(expectedManifestSerialization))) {
+		t.Fatalf("manifest size is not correct:\nexpected:\n%d\nactual:\n%v\n", int64(len([]byte(expectedManifestSerialization))), descriptor.Size)
+	}
+	if descriptor.Digest.String() != digest.FromBytes([]byte(expectedManifestSerialization)).String() {
+		t.Fatalf("manifest digest is not correct:\nexpected:\n%s\nactual:\n%s\n", digest.FromBytes([]byte(expectedManifestSerialization)), descriptor.Digest)
+	}
+	if descriptor.MediaType != v1.MediaTypeImageManifest {
+		t.Fatalf("manifest media type is not correct:\nexpected:\n%s\nactual:\n%s\n", v1.MediaTypeImageManifest, descriptor.MediaType)
+	}
+}
+
 func manifestMediaTypeTest(mediaType string, shouldError bool) func(*testing.T) {
 	return func(t *testing.T) {
 		mfst := makeTestManifest(mediaType)