diff --git a/book/source/glossary.md b/book/source/glossary.md
index e84c2ec..4e8363e 100644
--- a/book/source/glossary.md
+++ b/book/source/glossary.md
@@ -305,7 +305,7 @@ Life-cycle Management
     See [](self-signatures).
 
 Literal Data Packet
-    A packet which contains the plaintext data of an encrypted and/or signed message. See [RFC 5.9](https://www.ietf.org/archive/id/draft-ietf-openpgp-crypto-refresh-12.html#lit) for more details.
+    A {term}`packet` which contains the plaintext data of an encrypted and/or signed message. See [RFC 5.9](https://www.ietf.org/archive/id/draft-ietf-openpgp-crypto-refresh-12.html#lit) for more details.
 
 MAC
     See {term}`Message Authentication Code`.