1 files changed, 2 insertions, 0 deletions
diff --git a/tcp.h b/tcp.h
index 9007a93..7dbbcd8 100644
--- a/tcp.h
+++ b/tcp.h
@@ -107,6 +107,8 @@ struct tcphdr {
  */
 #undef TCP_MSS
 #define TCP_MSS 1460
+#undef TCP6_MSS
+#define TCP6_MSS 1440
 
 #undef TCP_MAXWIN
 #define TCP_MAXWIN 65535 /* largest value for (unscaled) window */