diff --git a/js/reveal.js b/js/reveal.js
index 41000d64..861059c7 100644
--- a/js/reveal.js
+++ b/js/reveal.js
@@ -516,7 +516,6 @@
 
 		// Cache references to elements
 		dom.controls = document.querySelector( '.reveal .controls' );
-		dom.theme = document.querySelector( '#theme' );
 
 		dom.wrapper.setAttribute( 'role', 'application' );