diff --git a/pcapkit/protocols/schema/internet/mh.py b/pcapkit/protocols/schema/internet/mh.py
index bd7e1e8d38..deab01f395 100644
--- a/pcapkit/protocols/schema/internet/mh.py
+++ b/pcapkit/protocols/schema/internet/mh.py
@@ -761,7 +761,7 @@ def __init__(self, type: 'Enum_Option', length: 'int', subtype: 'Enum_AuthSubtyp
 class MesgIDOption(Option, code=Enum_Option.MESG_ID_OPTION_TYPE):
     """Header schema for Mobility Message Replay Protection options."""
 
-    #: Timestamp (seconds since January 1st, 1970, c.f., :rfc:`1305`).
+    #: Timestamp (seconds since January 1st, 1900, c.f., :rfc:`1305`).
     seconds: 'int' = UInt32Field()
     #: Timestamp fractions (1/2**32 seconds per unit, c.f., :rfc:`1305`).
     fraction: 'int' = UInt32Field()