--- a/devtools/server/actors/animation.js
+++ b/devtools/server/actors/animation.js
@@ -220,17 +220,17 @@ var AnimationPlayerActor = protocol.Acto
   /**
    * Get the animation iteration count for this player. That is, how many times
    * is the animation scheduled to run.
    * @return {Number} The number of iterations, or null if the animation repeats
    * infinitely.
    */
   getIterationCount: function() {
     let iterations = this.player.effect.getComputedTiming().iterations;
-    return iterations === "Infinity" ? null : iterations;
+    return iterations === Infinity ? null : iterations;
   },
 
   /**
    * Get the animation iterationStart from this player, in ratio.
    * That is offset of starting position of the animation.
    * @return {Number}
    */
   getIterationStart: function() {