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-rw-r--r--doc/source/manual/mtu.rst2
1 files changed, 1 insertions, 1 deletions
diff --git a/doc/source/manual/mtu.rst b/doc/source/manual/mtu.rst
index 804404d..395a707 100644
--- a/doc/source/manual/mtu.rst
+++ b/doc/source/manual/mtu.rst
@@ -10,7 +10,7 @@ Unlike OpenVPN, fastd doesn't support fragmentation itself, but relies on the IP
Guidelines
----------
-* The basic overhead of a fastd packet in TUN mode over IPv4 is 39 Bytes when only null crypto is used and 52 Bytes for all other crypto methods
+* The basic overhead of a fastd packet in TUN mode over IPv4 is 29 Bytes when only null crypto is used and 52 Bytes for all other crypto methods
* TAP mode needs 14 bytes more than TUN mode
* Tunneling over IPv6 needs 20 bytes more than IPv4