diff --git a/examples/sideview.html b/examples/sideview.html
index 64e2601c..3b2cfd4c 100644
--- a/examples/sideview.html
+++ b/examples/sideview.html
@@ -23,7 +23,7 @@
             <p><a href="index.html">Switch to Full View</a></p>
         </div>
 
-        <iframe id="viewer"></iframe>
+        <iframe id="viewer" allowfullscreen="true" webkitallowfullscreen="true" mozallowfullscreen="true"></iframe>
 
 </body>
 </html>
\ No newline at end of file