diff --git a/ietf/static/js/nav.js b/ietf/static/js/nav.js
index f89e8466b..7d0bf6dff 100644
--- a/ietf/static/js/nav.js
+++ b/ietf/static/js/nav.js
@@ -38,7 +38,7 @@ export function populate_nav(nav, heading_selector, classes) {
             while (level < cur_level) {
                 let nav = nav_stack.pop();
                 cur_level--;
-                nav_stack[level].appendChild(nav);
+                nav_stack[cur_level].appendChild(nav);
             }
         } else {
             while (level > cur_level) {