diff --git a/twnet_parser/constants.py b/twnet_parser/constants.py
index 6c9b928..0d0f4bb 100644
--- a/twnet_parser/constants.py
+++ b/twnet_parser/constants.py
@@ -1 +1,2 @@
 NET_MAX_SEQUENCE = 1<<10
+NET_MAX_PACKETSIZE = 1400