diff --git a/lib/util/manifest_parser_utils.js b/lib/util/manifest_parser_utils.js
index 4a7046edf2..7be3caa716 100644
--- a/lib/util/manifest_parser_utils.js
+++ b/lib/util/manifest_parser_utils.js
@@ -167,7 +167,7 @@ shaka.util.ManifestParserUtils.VIDEO_CODEC_REGEXPS_ = [
   /^hev/,
   /^hvc/,
   /^vp0?[89]/,
-  /^av1$/,
+  /^av01/,
 ];
 
 
diff --git a/test/hls/manifest_text_parser_unit.js b/test/hls/manifest_text_parser_unit.js
index c637399510..c653d5e651 100644
--- a/test/hls/manifest_text_parser_unit.js
+++ b/test/hls/manifest_text_parser_unit.js
@@ -238,6 +238,25 @@ describe('ManifestTextParser', () => {
           '#EXTM3U\n' +
           '#EXT-X-MEDIA:CODECS="avc1.64002a,mp4a.40.2",AUDIO="a1,a2"',
 
+          // manifest URI:
+          'https://test/manifest.m3u8');
+
+      verifyPlaylist(
+          {
+            type: shaka.hls.PlaylistType.MASTER,
+            tags: [
+              new shaka.hls.Tag(/* id= */ 3, 'EXT-X-MEDIA',
+                  [
+                    new shaka.hls.Attribute('CODECS',
+                        'av01.0.08M.08,mp4a.40.2'),
+                  ]),
+            ],
+          },
+
+          // playlist text:
+          '#EXTM3U\n' +
+          '#EXT-X-MEDIA:CODECS="av01.0.08M.08,mp4a.40.2"',
+
           // manifest URI:
           'https://test/manifest.m3u8');
     });