diff --git a/static/js/mediastream/utils.js b/static/js/mediastream/utils.js
index 619151b9..8872b90a 100644
--- a/static/js/mediastream/utils.js
+++ b/static/js/mediastream/utils.js
@@ -233,7 +233,7 @@ define([], function() {
   // The format of |codec| is 'NAME/RATE', e.g. 'opus/48000'.
   function maybePreferCodec(sdp, type, dir, codec) {
     var str = type + ' ' + dir + ' codec';
-    if (codec === '') {
+    if (!codec) {
       trace('No preference on ' + str + '.');
       return sdp;
     }