diff --git a/headers.js b/headers.js
index 73b2dcf..daf2c51 100644
--- a/headers.js
+++ b/headers.js
@@ -36,7 +36,7 @@ const make_foldable = (root) => {
                 new_e.appendChild(old_e);
             }
 
-            foldable(stack.root, new_e);
+            if (stack.root.tagName !== "H1") foldable(stack.root, new_e);
             let parent_level;
             for (parent_level = level - 1; parent_level > 0; parent_level--) if (child_stacks[parent_level].root) break;