diff --git a/wireshark_gen/templates/openflow.lua b/wireshark_gen/templates/openflow.lua
index 3d62727..9ce51d2 100644
--- a/wireshark_gen/templates/openflow.lua
+++ b/wireshark_gen/templates/openflow.lua
@@ -166,6 +166,7 @@
             if offset + msg_len > buf:len() then
                 -- we don't have all the data we need yet
                 pkt.desegment_len = offset + msg_len - buf:len()
+                pkt.desegment_offset = offset
                 return
             end
 
@@ -184,6 +185,7 @@
         else
             -- we don't have all of length field yet
             pkt.desegment_len = DESEGMENT_ONE_MORE_SEGMENT
+            pkt.desegment_offset = offset
             return
         end
     until offset >= buf:len()