diff --git a/_includes/sidebar-toc-multipage-overview.html b/_includes/sidebar-toc-multipage-overview.html
index ce42167c98..6b89191dd6 100644
--- a/_includes/sidebar-toc-multipage-overview.html
+++ b/_includes/sidebar-toc-multipage-overview.html
@@ -22,9 +22,9 @@ <h5 class="contents">Contents</h5>
               {% for lpg in site.[page.language] %}
                 {% if lpg.id == localizedId %}
                   {% if pg.type %} <!-- if a type is set in a document, we add it as a class. Used in Scala book to diff between chapter and section -->
-                  <li class="type-{{ pg.type }}"><a {% if page.title == lpg.title %}class="active"{% endif %} href="{{ site.baseurl }}{{ pg.url }}">{{ lpg.title }}</a>{{ toc }}</li>
+                  <li class="type-{{ pg.type }}"><a {% if page.num == pg.num %}class="active"{% endif %} href="{{ site.baseurl }}{{ pg.url }}">{{ lpg.title }}</a>{{ toc }}</li>
                   {% else %}
-                  <li><a {% if page.title == lpg.title %}class="active"{% endif %} href="{{ site.baseurl }}{{ pg.url }}">{{ lpg.title }}</a>{{ toc }}</li>
+                  <li><a {% if page.num == pg.num %}class="active"{% endif %} href="{{ site.baseurl }}{{ pg.url }}">{{ lpg.title }}</a>{{ toc }}</li>
                   {% endif %}
                 {% endif %}
               {% endfor %}