diff --git a/management/templates/users.html b/management/templates/users.html
index 5ea45da9..4ed33189 100644
--- a/management/templates/users.html
+++ b/management/templates/users.html
@@ -40,7 +40,7 @@
   <li>Use <a href="#" onclick="return show_panel('aliases')">aliases</a> to create email addresses that forward to existing accounts.</li>
   <li>Administrators get access to this control panel.</li>
   <li>User accounts cannot contain any international (non-ASCII) characters, but <a href="#" onclick="return show_panel('aliases');">aliases</a> can.</li>
-  <li>Quotas may not contain any spaces or commas. Suffixes of G (gigabytes) and M (megabytes) are allowed.  For unlimited storage enter 0 (zero)</li>
+  <li>Quotas may not contain any spaces, commas or decimal points. Suffixes of G (gigabytes) and M (megabytes) are allowed.  For unlimited storage enter 0 (zero)</li>
 </ul>
 
 <h3>Existing mail users</h3>