diff --git a/layouts/partials/shortcodes/expand.html b/layouts/partials/shortcodes/expand.html
index 0b95a956cc..1904020e99 100644
--- a/layouts/partials/shortcodes/expand.html
+++ b/layouts/partials/shortcodes/expand.html
@@ -13,7 +13,7 @@
 {{- $id := cond (or (eq .id nil) (eq .id "")) (partial "make-random-md5.hugo" $page) .id }}
 {{- with $page }}
 <div class="expand">
-    <input type="checkbox" id="R-expand-{{ $id }}" aria-controls="expandcontent-{{ $id }}" {{ if $expanded }} checked{{ end }}>
+    <input type="checkbox" id="R-expand-{{ $id }}" aria-controls="R-expandcontent-{{ $id }}" {{ if $expanded }} checked{{ end }}>
     <label class="expand-label" for="R-expand-{{ $id }}" >
         <i class="fas fa-chevron-down"></i>
         <i class="fas fa-chevron-right"></i>