diff --git a/cid.go b/cid.go
index 87f878d..896391c 100644
--- a/cid.go
+++ b/cid.go
@@ -30,7 +30,7 @@ const (
 func NewCidV0(h mh.Multihash) *Cid {
 	return &Cid{
 		version: 0,
-		codec:   Protobuf,
+		codec:   DagProtobuf,
 		hash:    h,
 	}
 }
@@ -114,7 +114,7 @@ func Cast(data []byte) (*Cid, error) {
 		}
 
 		return &Cid{
-			codec:   Protobuf,
+			codec:   DagProtobuf,
 			version: 0,
 			hash:    h,
 		}, nil
diff --git a/cid_test.go b/cid_test.go
index c03e281..0cf5225 100644
--- a/cid_test.go
+++ b/cid_test.go
@@ -93,7 +93,7 @@ func TestV0ErrorCases(t *testing.T) {
 func TestPrefixRoundtrip(t *testing.T) {
 	data := []byte("this is some test content")
 	hash, _ := mh.Sum(data, mh.SHA2_256, -1)
-	c := NewCidV1(CBOR, hash)
+	c := NewCidV1(DagCBOR, hash)
 
 	pref := c.Prefix()
 
@@ -122,7 +122,7 @@ func TestPrefixRoundtrip(t *testing.T) {
 func Test16BytesVarint(t *testing.T) {
 	data := []byte("this is some test content")
 	hash, _ := mh.Sum(data, mh.SHA2_256, -1)
-	c := NewCidV1(CBOR, hash)
+	c := NewCidV1(DagCBOR, hash)
 
 	c.codec = 1 << 63
 	_ = c.Bytes()