diff --git a/spec/index.html b/spec/index.html
index 48ed9e6..25053df 100644
--- a/spec/index.html
+++ b/spec/index.html
@@ -754,6 +754,7 @@ <h5>Representation of blank nodes</h5>
 
         <pre class="example" title="Blank nodes (alternative notation)">
           @prefix foaf: &lt;http://xmlns.com/foaf/0.1/&gt; .
+          @prefix dcterms: &lt;http://purl.org/dc/terms/&gt; .
 
           # Some resource (blank node) is interested in some other resource
           # entitled "Mona Lisa" and created by Leonardo da Vinci.