diff --git a/object/service.go b/object/service.go
index ab3bf5f..45a8d4b 100644
--- a/object/service.go
+++ b/object/service.go
@@ -125,13 +125,14 @@ func (m *GetResponse) NotFull() bool { return checkIsNotFull(m) }
 func (m *PutRequest) NotFull() bool { return checkIsNotFull(m) }
 
 // CID returns container id value from object put request.
-func (m *PutRequest) CID() CID {
-	if header := m.GetHeader(); header != nil {
-		if obj := header.GetObject(); obj != nil {
-			return obj.SystemHeader.CID
-		}
+func (m *PutRequest) CID() (cid CID) {
+	if header := m.GetHeader(); header == nil {
+		return
+	} else if obj := header.GetObject(); obj == nil {
+		return
+	} else {
+		return obj.SystemHeader.CID
 	}
-	return refs.CID{}
 }
 
 // CID returns container id value from object get request.
diff --git a/object/service_test.go b/object/service_test.go
index f38e2ed..4b02b37 100644
--- a/object/service_test.go
+++ b/object/service_test.go
@@ -17,6 +17,7 @@ func TestRequest(t *testing.T) {
 		&GetRangeRequest{},
 		&GetRangeHashRequest{},
 		MakePutRequestHeader(nil, nil),
+		MakePutRequestHeader(&Object{}, nil),
 	}
 
 	types := []RequestType{
@@ -28,12 +29,13 @@ func TestRequest(t *testing.T) {
 		RequestRange,
 		RequestRangeHash,
 		RequestPut,
+		RequestPut,
 	}
 
 	for i := range cases {
 		v := cases[i]
 
-		t.Run(fmt.Sprintf("%T", v), func(t *testing.T) {
+		t.Run(fmt.Sprintf("%T_%d", v, i), func(t *testing.T) {
 			require.NotPanics(t, func() { v.CID() })
 			require.Equal(t, types[i], v.Type())
 		})