diff --git a/externs/ima.js b/externs/ima.js
index b23fb10bd3..bfdbab68f9 100644
--- a/externs/ima.js
+++ b/externs/ima.js
@@ -204,6 +204,8 @@ google.ima.AdDisplayContainer = class {
   constructor(adContainer, video) {}
 
   initialize() {}
+
+  destroy() {}
 };
 
 
diff --git a/lib/ads/client_side_ad_manager.js b/lib/ads/client_side_ad_manager.js
index 976e9b5675..7dbef48a73 100644
--- a/lib/ads/client_side_ad_manager.js
+++ b/lib/ads/client_side_ad_manager.js
@@ -63,16 +63,17 @@ shaka.ads.ClientSideAdManager = class {
 
     google.ima.settings.setDisableCustomPlaybackForIOS10Plus(true);
 
-    const adDisplayContainer = new google.ima.AdDisplayContainer(
+    /** @private {!google.ima.AdDisplayContainer} */
+    this.adDisplayContainer_ = new google.ima.AdDisplayContainer(
         this.adContainer_,
         this.video_);
 
     // TODO: IMA: Must be done as the result of a user action on mobile
-    adDisplayContainer.initialize();
+    this.adDisplayContainer_.initialize();
 
     // IMA: This instance should be re-used for the entire lifecycle of
     // the page.
-    this.adsLoader_ = new google.ima.AdsLoader(adDisplayContainer);
+    this.adsLoader_ = new google.ima.AdsLoader(this.adDisplayContainer_);
 
     this.adsLoader_.getSettings().setPlayerType('shaka-player');
     this.adsLoader_.getSettings().setPlayerVersion(shaka.Player.version);
@@ -176,6 +177,7 @@ shaka.ads.ClientSideAdManager = class {
       this.imaAdsManager_.destroy();
     }
     this.adsLoader_.destroy();
+    this.adDisplayContainer_.destroy();
   }
 
   /**