diff --git a/src/loader/m3u8-parser.ts b/src/loader/m3u8-parser.ts
index ae61a616c26..8300d799093 100644
--- a/src/loader/m3u8-parser.ts
+++ b/src/loader/m3u8-parser.ts
@@ -61,6 +61,10 @@ const LEVEL_PLAYLIST_REGEX_SLOW = new RegExp(
 
 const MP4_REGEX_SUFFIX = /\.(mp4|m4s|m4v|m4a)$/i;
 
+function isMP4Url(url: string): boolean {
+  return MP4_REGEX_SUFFIX.test(URLToolkit.parseURL(url)?.path ?? '');
+}
+
 export default class M3U8Parser {
   static findGroup(
     groups: Array<AudioGroup>,
@@ -511,8 +515,8 @@ export default class M3U8Parser {
           // if the fragments are TS or MP4, except if we download them :/
           // but this is to be able to handle SIDX.
           if (
-            level.fragments.every((frag) =>
-              MP4_REGEX_SUFFIX.test(frag.relurl as string)
+            level.fragments.every(
+              (frag) => frag.relurl && isMP4Url(frag.relurl)
             )
           ) {
             logger.warn(
diff --git a/tests/unit/loader/playlist-loader.js b/tests/unit/loader/playlist-loader.js
index 34f12b09b48..c1b06603035 100644
--- a/tests/unit/loader/playlist-loader.js
+++ b/tests/unit/loader/playlist-loader.js
@@ -344,6 +344,23 @@ http://proxy-62.dailymotion.com/sec(3ae40f708f79ca9471f52b86da76a3a8)/video/107/
     );
   });
 
+  it('handles a missing init segment for mp4 segment urls', function () {
+    const level = `#EXTM3U
+#EXT-X-VERSION:3
+#EXT-X-PLAYLIST-TYPE:VOD
+#EXT-X-TARGETDURATION:14
+#EXTINF:11.360,
+/something.mp4?abc
+#EXT-X-ENDLIST`;
+    const result = M3U8Parser.parseLevelPlaylist(
+      level,
+      'http://example.invalid/playlist.m3u8',
+      0
+    );
+    expect(result.initSegment).to.be.ok;
+    expect(result.initSegment.relurl).to.equal('/something.mp4?abc');
+  });
+
   it('parse level with single char fragment URI', function () {
     const level = `#EXTM3U
 #EXT-X-ALLOW-CACHE:NO