diff --git a/static/videoOverlay.js b/static/videoOverlay.js
index fe1500b..b132a1e 100644
--- a/static/videoOverlay.js
+++ b/static/videoOverlay.js
@@ -4,7 +4,7 @@ window.addEventListener('message', function(event) {
         if (data.event == 'close') {
             var element = document.getElementById(data.id);
             Array.prototype.forEach.call(element.parentElement.getElementsByClassName('button'), function(element) {
-                if (editable || element.className = 'button playButton') {
+                if (editable || element.className == 'button playButton') {
                     element.style.display = 'block';
                 }
             });