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-rw-r--r--ryu/lib/packet/ipv6.py2
1 files changed, 1 insertions, 1 deletions
diff --git a/ryu/lib/packet/ipv6.py b/ryu/lib/packet/ipv6.py
index 4131491e..6a62abaf 100644
--- a/ryu/lib/packet/ipv6.py
+++ b/ryu/lib/packet/ipv6.py
@@ -112,7 +112,7 @@ class ipv6(packet_base.PacketBase):
def serialize(self, payload, prev):
hdr = bytearray(40)
v_tc_flow = (self.version << 28 | self.traffic_class << 20 |
- self.flow_label << 12)
+ self.flow_label)
struct.pack_into(ipv6._PACK_STR, hdr, 0, v_tc_flow,
self.payload_length, self.nxt, self.hop_limit,
addrconv.ipv6.text_to_bin(self.src),