diff --git a/agls.module b/agls.module
index df0ddc4..cb68862 100644
--- a/agls.module
+++ b/agls.module
@@ -33,4 +33,5 @@ function agls_preprocess_html(&$vars) {
   );
 
   drupal_add_html_head($element, 'agls_schema');
+  $variables['rdf_namespaces'] .= "\n  AGLSTERMS=\"http://www.agls.gov.au/agls/terms/\"";
 }