diff --git a/doc/install.html b/doc/install.html
index e8bc7fb9..a944ea70 100644
--- a/doc/install.html
+++ b/doc/install.html
@@ -658,7 +658,8 @@
                             The URI of a property that can be used to 
                             associate an Individual with a user account. When a user logs in with a 
                             name that matches the value of this property, the user will be  
-                            authorized to edit that Individual. 
+                            authorized to edit that Individual 
+                            (the value of the property must be either a String literal or an untyped literal). 
                         </td>
                     </tr>
                     <tr class="odd_row">