diff --git a/UdpVpn.cpp b/UdpVpn.cpp
index adb2344..0363f31 100644
--- a/UdpVpn.cpp
+++ b/UdpVpn.cpp
@@ -11,7 +11,7 @@
 
 #include "ip_header.hpp"
 
-static const size_t VPN_MTU = 1500; // TODO determine this
+static const size_t VPN_MTU = 1460; // TODO determine this -- issue #3
 
 UdpVpn::UdpVpn()
     : _stopped(false), _vpn_mtu(VPN_MTU), _tun_dev("cvpn%d")