diff --git a/ldap.conf.adoc b/ldap.conf.adoc
index dbe0c54..e1193bb 100644
--- a/ldap.conf.adoc
+++ b/ldap.conf.adoc
@@ -30,7 +30,18 @@ The file `/etc/pmg/ldap.conf` contains the LDAP configuration.
 File Format
 -----------
 
-TODO
+The file is divided into a section for each LDAP profile. Each section has
+the following format:
+
+----
+ldap: NAME
+	 OPTION value
+	 ...
+----
+
+Blank lines in the file separates sections, and lines starting with a `#`
+character are treated as comments and are also ignored.
+
 
 Options
 -------