diff --git a/docs/site-example/site.conf b/docs/site-example/site.conf
index 1580d90141d1d2869d39324412e9a535ed73f0cb..cab80f96c611433c0bac2e2ba89000335445d2d7 100644
--- a/docs/site-example/site.conf
+++ b/docs/site-example/site.conf
@@ -90,7 +90,7 @@
     -- enabled = true,
     -- configurable = true,
 
-    mtu = 1426,
+    mtu = 1280,
     groups = {
       backbone = {
         -- Limit number of connected peers to reduce bandwidth.
diff --git a/docs/user/site.rst b/docs/user/site.rst
index 055d43bafa659b910c2fdf372e8ae9ffec62d04e..9b4020453ecaeb56031c83de9b0d5a66139cd4f4 100644
--- a/docs/user/site.rst
+++ b/docs/user/site.rst
@@ -138,7 +138,7 @@ fastd_mesh_vpn
         methods = {'salsa2012+umac'},
 	-- enabled = true,
 	-- configurable = true,
-        mtu = 1426,
+        mtu = 1280,
         groups = {
           backbone = {
             limit = 2,