diff --git a/ckanext/iaea/templates/header.html b/ckanext/iaea/templates/header.html
index 5c677b5..b7fac66 100644
--- a/ckanext/iaea/templates/header.html
+++ b/ckanext/iaea/templates/header.html
@@ -155,8 +155,8 @@
         <nav class="section navigation">
           <ul class="nav nav-pills">
             {% block header_site_navigation_tabs %} {{ h.build_nav_main(
-            ('dataset.search', _('Datasets')), ('organization.index',
-            _('Topics'))) }} {% endblock %}
+            ('organization.index', _('Topics')), ('dataset.search',
+            _('Datasets'))) }} {% endblock %}
           </ul>
         </nav>
         <div class="navbar-right">