diff --git a/lib/media/drm_engine.js b/lib/media/drm_engine.js
index 0603dd3416..b3d6c343f4 100644
--- a/lib/media/drm_engine.js
+++ b/lib/media/drm_engine.js
@@ -1424,6 +1424,9 @@ shaka.media.DrmEngine = class {
       }
       return;
     }
+    if (this.destroyer_.destroyed()) {
+      return;
+    }
 
     const updateEvent = new shaka.util.FakeEvent('drmsessionupdate');
     this.playerInterface_.onEvent(updateEvent);