diff --git a/lib/hls/hls_parser.js b/lib/hls/hls_parser.js
index 0c7260f931..8ecf5278e2 100644
--- a/lib/hls/hls_parser.js
+++ b/lib/hls/hls_parser.js
@@ -3982,7 +3982,9 @@ shaka.hls.HlsParser = class {
     }
     let dateRangeTags =
         shaka.hls.Utils.filterTagsByName(tags, 'EXT-X-DATERANGE');
-    dateRangeTags = dateRangeTags.sort((a, b) => {
+    dateRangeTags = dateRangeTags.filter((tag) => {
+      return tag.getAttribute('START-DATE') != null;
+    }).sort((a, b) => {
       const aStartDateValue = a.getRequiredAttrValue('START-DATE');
       const bStartDateValue = b.getRequiredAttrValue('START-DATE');
       if (aStartDateValue < bStartDateValue) {