diff --git a/lib/ads/media_tailor_ad.js b/lib/ads/media_tailor_ad.js
index 11062e39cb..d34ccd65e0 100755
--- a/lib/ads/media_tailor_ad.js
+++ b/lib/ads/media_tailor_ad.js
@@ -24,6 +24,7 @@ shaka.ads.MediaTailorAd = class {
     /** @private {?mediaTailor.Ad} */
     this.ad_ = mediaTailorAd;
 
+    /** @private {?number} */
     this.skipOffset_ = this.parseTime_(this.ad_.skipOffset);
 
     /** @private {HTMLMediaElement} */