diff --git a/v2/object/convert.go b/v2/object/convert.go
index 51a2cd8..0768689 100644
--- a/v2/object/convert.go
+++ b/v2/object/convert.go
@@ -135,6 +135,8 @@ func SplitHeaderToGRPCMessage(h *SplitHeader) *object.Header_Split {
 
 	m.SetChildren(childMsg)
 
+	m.SetSplitId(h.GetSplitID())
+
 	return m
 }
 
@@ -170,6 +172,8 @@ func SplitHeaderFromGRPCMessage(m *object.Header_Split) *SplitHeader {
 
 	h.SetChildren(children)
 
+	h.SetSplitID(m.GetSplitId())
+
 	return h
 }
 
diff --git a/v2/object/marshal.go b/v2/object/marshal.go
index b59419e..4e54b34 100644
--- a/v2/object/marshal.go
+++ b/v2/object/marshal.go
@@ -21,6 +21,7 @@ const (
 	splitHdrParentSignatureField = 3
 	splitHdrParentHeaderField    = 4
 	splitHdrChildrenField        = 5
+	splitHdrSplitIDField         = 6
 
 	hdrVersionField         = 1
 	hdrContainerIDField     = 2
@@ -275,6 +276,11 @@ func (h *SplitHeader) StableMarshal(buf []byte) ([]byte, error) {
 		offset += n
 	}
 
+	_, err = proto.BytesMarshal(splitHdrSplitIDField, buf[offset:], h.splitID)
+	if err != nil {
+		return nil, err
+	}
+
 	return buf, nil
 }
 
@@ -292,6 +298,8 @@ func (h *SplitHeader) StableSize() (size int) {
 		size += proto.NestedStructureSize(splitHdrChildrenField, h.children[i])
 	}
 
+	size += proto.BytesSize(splitHdrSplitIDField, h.splitID)
+
 	return size
 }
 
diff --git a/v2/object/marshal_test.go b/v2/object/marshal_test.go
index efd5df3..7f811af 100644
--- a/v2/object/marshal_test.go
+++ b/v2/object/marshal_test.go
@@ -461,6 +461,7 @@ func generateSplit(sig string) *object.SplitHeader {
 	split.SetParent(generateObjectID("Parent"))
 	split.SetParentSignature(generateSignature("Key", sig))
 	split.SetPrevious(generateObjectID("Previous"))
+	split.SetSplitID([]byte("UUIDv4"))
 
 	return split
 }
diff --git a/v2/object/types.go b/v2/object/types.go
index d5b37ef..6898cf6 100644
--- a/v2/object/types.go
+++ b/v2/object/types.go
@@ -33,6 +33,8 @@ type SplitHeader struct {
 	parHdr *Header
 
 	children []*refs.ObjectID
+
+	splitID []byte
 }
 
 type Header struct {
@@ -380,6 +382,20 @@ func (h *SplitHeader) SetChildren(v []*refs.ObjectID) {
 	}
 }
 
+func (h *SplitHeader) GetSplitID() []byte {
+	if h != nil {
+		return h.splitID
+	}
+
+	return nil
+}
+
+func (h *SplitHeader) SetSplitID(v []byte) {
+	if h != nil {
+		h.splitID = v
+	}
+}
+
 func (h *Header) GetVersion() *refs.Version {
 	if h != nil {
 		return h.version