diff --git a/doc/guide/preamble.sdf b/doc/guide/preamble.sdf
index e47b097ed9367e0d29d288be2fda9d8e61279d8d..7f45098a9a1f8b2865b7e58d870069d73359728c 100644
--- a/doc/guide/preamble.sdf
+++ b/doc/guide/preamble.sdf
@@ -164,7 +164,7 @@ ASN.1|Abstract Syntax Notation - One
 AVA|Attribute Value Assertion
 AuthcDN|Authentication DN
 AuthcId|Authentication Identity
-AuthzDN|Authorizaiton DN
+AuthzDN|Authorization DN
 AuthzId|Authorization Identity
 BCP|Best Current Practice
 BDB|Berkeley DB (Backend)