diff --git a/src/js/slide/placeholder.js b/src/js/slide/placeholder.js
index d1d7b2d1..732349e5 100644
--- a/src/js/slide/placeholder.js
+++ b/src/js/slide/placeholder.js
@@ -24,7 +24,7 @@ class Placeholder {
       this.element.setAttribute('role', 'presentation');
     }
 
-    this.element.setAttribute('aria-hiden', 'true');
+    this.element.setAttribute('aria-hidden', 'true');
   }
 
   /**