diff --git a/lib/hls/hls_parser.js b/lib/hls/hls_parser.js
index 2c07ae7316..f6cba67cfc 100644
--- a/lib/hls/hls_parser.js
+++ b/lib/hls/hls_parser.js
@@ -2846,6 +2846,11 @@ shaka.hls.HlsParser = class {
           // A preload hinted partial segment may have byterange start info.
           const pByterangeStart = item.getAttributeValue('BYTERANGE-START');
           pStartByte = pByterangeStart ? Number(pByterangeStart) : 0;
+          // A preload hinted partial segment may have byterange length info.
+          const pByterangeLength = item.getAttributeValue('BYTERANGE-LENGTH');
+          if (pByterangeLength) {
+            pEndByte = pStartByte + Number(pByterangeLength) - 1;
+          }
         } else {
           const pByterange = item.getAttributeValue('BYTERANGE');
           [pStartByte, pEndByte] =
diff --git a/test/hls/hls_live_unit.js b/test/hls/hls_live_unit.js
index ecd249766b..d923d7aa7b 100644
--- a/test/hls/hls_live_unit.js
+++ b/test/hls/hls_live_unit.js
@@ -643,7 +643,8 @@ describe('HlsParser live', () => {
         // partialRef3
         '#EXT-X-PART:DURATION=2,URI="partial.mp4",BYTERANGE=210@0\n',
         // preloadRef
-        '#EXT-X-PRELOAD-HINT:TYPE=PART,URI="partial.mp4",BYTERANGE-START=210\n',
+        '#EXT-X-PRELOAD-HINT:TYPE=PART,URI="partial.mp4",BYTERANGE-START=210,',
+        'BYTERANGE-LENGTH=210\n',
       ].join('');
 
       const partialRef = makeReference(
@@ -665,13 +666,13 @@ describe('HlsParser live', () => {
 
       const preloadRef = makeReference(
           'test:/partial.mp4', 6, 7.5, /* syncTime= */ null,
-          /* baseUri= */ '', /* startByte= */ 210, /* endByte= */ null);
+          /* baseUri= */ '', /* startByte= */ 210, /* endByte= */ 419);
       preloadRef.markAsPreload();
 
       // ref2 is not fully published yet, so it doesn't have a segment uri.
       const ref2 = makeReference(
           '', 4, 7.5, /* syncTime= */ null,
-          /* baseUri= */ '', /* startByte= */ 0, /* endByte= */ null,
+          /* baseUri= */ '', /* startByte= */ 0, /* endByte= */ 419,
           /* timestampOffset= */ 0, [partialRef3, preloadRef]);
 
       await testInitialManifest(master, mediaWithPartialSegments, [ref, ref2]);