diff --git a/book/source/glossary.md b/book/source/glossary.md
index 08794e4..a422284 100644
--- a/book/source/glossary.md
+++ b/book/source/glossary.md
@@ -684,7 +684,7 @@ Unhashed Subpacket
     A {term}`Signature Subpacket` residing in the {term}`Unhashed Area` of a {term}`Signature Packet`.
 
 User Attribute
-    An {term}`Identity Component`, which may hold a single JPEG image. See [](user-attributes).
+    An {term}`Identity Component`, which may hold complex attribute data, e.g. a single JPEG image. See [](user-attributes).
 
 User ID
     An {term}`Identity Component`, which describes an {term}`Identity` of a {term}`Certificate Holder`. See [](user-ids).