Rails - Mar 2006 - checking for existence of object in views

In my views I often find an error caused by trying to display a  
property of a non-existent object.

Is there is a simpler way to avoid this than to append an ''if''
conditional at the end
of each statement where the ''belongs_to'' object does not
exist?

<% for person in @people %>
   <tr>
     <td><%=h person.address.streetname if person.address
%></td>
   </tr>
<% end %>

thanks,

Mike