diff --git a/cortex/webgl/resources/js/mriview.js b/cortex/webgl/resources/js/mriview.js
index ee85c8b1..a407b03c 100644
--- a/cortex/webgl/resources/js/mriview.js
+++ b/cortex/webgl/resources/js/mriview.js
@@ -738,10 +738,6 @@ var mriview = (function(module) {
         var surf = new surftype(this.active, opts);
         surf.addEventListener("mix", this._mix);
         surf.addEventListener("allowTilt", this._allowTilt);
-        // The SVG overlay (ROIs/sulci/labels) re-bakes its texture asynchronously, then
-        // dispatches "update" on the surface once the new texture is swapped in. Redraw when
-        // that lands, otherwise a toggle isn't visible until the next interaction.
-        surf.addEventListener("update", this.schedule.bind(this));
 
         this.surfs.push(surf);
         this.root.add(surf.object);