1 diff --git a/scapy/contrib/mpls.py b/scapy/contrib/mpls.py
2 index 8daddf2..a9dc7fe 100644
3 --- a/scapy/contrib/mpls.py
4 +++ b/scapy/contrib/mpls.py
6 from scapy.packet import Packet, bind_layers, Padding
7 from scapy.fields import BitField,ByteField
8 from scapy.layers.inet import IP
9 +from scapy.contrib.bier import BIER
10 from scapy.layers.inet6 import IPv6
11 from scapy.layers.l2 import Ether, GRE
12 from scapy.compat import orb
13 @@ -36,6 +37,8 @@ class MPLS(Packet):
14 ip_version = (orb(payload[0]) >> 4) & 0xF
17 + elif ip_version == 5: