diff --git a/tambo_a11y_view.html b/tambo_a11y_view.html
index adc38dbb..7a78233e 100644
--- a/tambo_a11y_view.html
+++ b/tambo_a11y_view.html
@@ -492,7 +492,7 @@ <h3>PDOM & Descriptions for Tambo Demo</h3>
 
       const simFrame = document.getElementById( 'iframe' );
       const innerWindow = simFrame.contentWindow;
-      const PDOMRoot = innerWindow.phet.joist.sim.display.accessibleDOMElement; // copy of the parallel DOM
+      const PDOMRoot = innerWindow.phet.joist.display.accessibleDOMElement; // copy of the parallel DOM
 
       // get the alert dom elements from the iframe's inner document
       const ariaLiveElementsContainer = innerWindow.phet.joist.sim.utteranceQueue.getAriaLiveContainer();