diff --git a/extensions/odoo_theme/static/js/page_toc.js b/extensions/odoo_theme/static/js/page_toc.js
index 14678d703..7f972d6d4 100644
--- a/extensions/odoo_theme/static/js/page_toc.js
+++ b/extensions/odoo_theme/static/js/page_toc.js
@@ -16,8 +16,7 @@
             // Allow to automatically collapse and expand TOC entries
             _prepareAccordion(pageToc);
 
-            // Allow to respectively highlight and expand the TOC entries and their related TOC
-            // entry list whose section is focused.
+            // Highlight TOC entries whose section is focused and expand their TOC entry list.
             _flagActiveTocEntriesAndLists(pageToc, headingRefs);
 
             // Allow to hide the TOC entry referring the title (<h1> heading)
@@ -98,6 +97,12 @@
                     // Highlight all <li> in the active hierarchy
                     tocEntry.classList.add('o_active_toc_entry');
 
+                    // Update the attributes on the <i>.
+                    const tocEntryWrapper = tocEntry.querySelector('.o_toc_entry_wrapper');
+                    if (tocEntryWrapper) {
+                        tocEntryWrapper.querySelector('i').setAttribute('aria-expanded', true);
+                    }
+
                     // Expand all related <ul>
                     const relatedTocEntryList = tocEntry.querySelector('ul');
                     if (relatedTocEntryList) {