diff --git a/guacamole-common-js/src/main/resources/layer.js b/guacamole-common-js/src/main/resources/layer.js
index a72030e3f..0553aa333 100644
--- a/guacamole-common-js/src/main/resources/layer.js
+++ b/guacamole-common-js/src/main/resources/layer.js
@@ -510,10 +510,10 @@ Guacamole.Layer = function(width, height) {
             
             render_callback();
             
-        });
+        }, false);
 
         // Unblock future operations after an error
-        video.addEventListener("error", lock.unblock);
+        video.addEventListener("error", lock.unblock, false);
 
         // Play video as soon as current tasks are complete, now that the
         // lock has been set up.