diff --git a/intermud/doc/intermud-v25.rst b/intermud/doc/intermud-v25.rst
index 0f27c2b..33d67c0 100644
--- a/intermud/doc/intermud-v25.rst
+++ b/intermud/doc/intermud-v25.rst
@@ -238,7 +238,7 @@
 order at the start of the packet before any other fields. This 3 fields are
 also referred to as the 'packet header'. The general layout of packets is:
 
-   [fragmentation header]|packet header|packet payload/data
+   [fragmentation header|]packet header|packet payload/data
 
 The packet header **MUST NOT** be larger than 512 bytes.