diff --git a/doc/hx509.texi b/doc/hx509.texi
index 272540288..fb835260d 100644
--- a/doc/hx509.texi
+++ b/doc/hx509.texi
@@ -528,10 +528,28 @@ hxtool issue-certificate \
           ...
 @end example
 
-
-
 @subsection PK-INIT
 
+How to create a certificate for a KDC.
+
+@example
+hxtool issue-certificate \
+    --type="pkinit-kdc" \
+    --pk-init-principal="krbtgt/TEST.H5L.SE@@TEST.H5L.SE" \
+    --hostname kerberos.test.h5l.se \
+    --hostname pal.test.h5l.se \
+    ...
+@end example
+
+How to create a certificate for a user.
+
+@example
+hxtool issue-certificate \
+    --type="pkinit-client" \
+    --pk-init-principal="user@@TEST.H5L.SE" \
+    ...
+@end example
+
 @subsection XMPP/Jabber
 
 The jabber server certificate should have a dNSname that is the same as