diff --git a/lib/media/manifest_filterer.js b/lib/media/manifest_filterer.js
index 6cc1a3ca46..a5e3135e13 100644
--- a/lib/media/manifest_filterer.js
+++ b/lib/media/manifest_filterer.js
@@ -59,7 +59,8 @@ shaka.media.ManifestFilterer = class {
    */
   async filterManifestWithStreamUtils_(manifest) {
     goog.asserts.assert(manifest, 'Manifest should exist!');
-    await shaka.util.StreamUtils.filterManifest(this.drmEngine_, manifest);
+    await shaka.util.StreamUtils.filterManifest(this.drmEngine_, manifest,
+        this.config_.drm.preferredKeySystems);
     this.checkPlayableVariants_(manifest);
   }
 
diff --git a/lib/offline/storage.js b/lib/offline/storage.js
index 0235e595c7..aee97a554a 100644
--- a/lib/offline/storage.js
+++ b/lib/offline/storage.js
@@ -664,7 +664,8 @@ shaka.offline.Storage = class {
     // Filter the manifest based on what we know MediaCapabilities will be able
     // to play later (no point storing something we can't play).
     await shaka.util.StreamUtils.filterManifestByMediaCapabilities(
-        drmEngine, manifest, config.offline.usePersistentLicense);
+        drmEngine, manifest, config.offline.usePersistentLicense,
+        config.drm.preferredKeySystems);
 
     // Gather all tracks.
     const allTracks = [];
diff --git a/lib/util/stream_utils.js b/lib/util/stream_utils.js
index 6ce87fb624..9cc8b1799d 100644
--- a/lib/util/stream_utils.js
+++ b/lib/util/stream_utils.js
@@ -337,10 +337,12 @@ shaka.util.StreamUtils = class {
    *
    * @param {shaka.media.DrmEngine} drmEngine
    * @param {shaka.extern.Manifest} manifest
+   * @param {!Array<string>=} preferredKeySystems
    */
-  static async filterManifest(drmEngine, manifest) {
+  static async filterManifest(drmEngine, manifest, preferredKeySystems = []) {
     await shaka.util.StreamUtils.filterManifestByMediaCapabilities(
-        drmEngine, manifest, manifest.offlineSessionIds.length > 0);
+        drmEngine, manifest, manifest.offlineSessionIds.length > 0,
+        preferredKeySystems);
     shaka.util.StreamUtils.filterTextStreams_(manifest);
     await shaka.util.StreamUtils.filterImageStreams_(manifest);
   }
@@ -353,15 +355,16 @@ shaka.util.StreamUtils = class {
    * @param {shaka.media.DrmEngine} drmEngine
    * @param {shaka.extern.Manifest} manifest
    * @param {boolean} usePersistentLicenses
+   * @param {!Array<string>} preferredKeySystems
    */
   static async filterManifestByMediaCapabilities(
-      drmEngine, manifest, usePersistentLicenses) {
+      drmEngine, manifest, usePersistentLicenses, preferredKeySystems) {
     goog.asserts.assert(navigator.mediaCapabilities,
         'MediaCapabilities should be valid.');
 
     await shaka.util.StreamUtils.getDecodingInfosForVariants(
         manifest.variants, usePersistentLicenses, /* srcEquals= */ false,
-        /** preferredKeySystems= */ []);
+        preferredKeySystems);
 
     let keySystem = null;
     if (drmEngine) {