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-rw-r--r--ryu/lib/packet/ospf.py2
1 files changed, 1 insertions, 1 deletions
diff --git a/ryu/lib/packet/ospf.py b/ryu/lib/packet/ospf.py
index 368016d2..c2d33b96 100644
--- a/ryu/lib/packet/ospf.py
+++ b/ryu/lib/packet/ospf.py
@@ -166,7 +166,7 @@ class LSAHeader(StringifyMixin):
id_ = addrconv.ipv4.text_to_bin(self.id_)
else:
id_ = (self.opaque_type << 24) + self.opaque_id
- (id_,) = struct.unpack_from('4s', struct.pack('I', id_))
+ (id_,) = struct.unpack_from('4s', struct.pack('!I', id_))
adv_router = addrconv.ipv4.text_to_bin(self.adv_router)
return bytearray(struct.pack(self._HDR_PACK_STR, self.ls_age,