diff --git a/client/players/LocalAudioPlayer.js b/client/players/LocalAudioPlayer.js
index 7fc17e7aa..377818089 100644
--- a/client/players/LocalAudioPlayer.js
+++ b/client/players/LocalAudioPlayer.js
@@ -46,7 +46,14 @@ export default class LocalAudioPlayer extends EventEmitter {
     this.player.addEventListener('loadedmetadata', this.evtLoadedMetadata.bind(this))
     this.player.addEventListener('timeupdate', this.evtTimeupdate.bind(this))
 
-    var mimeTypes = ['audio/flac', 'audio/mpeg', 'audio/mp4', 'audio/ogg', 'audio/aac', 'audio/x-ms-wma', 'audio/x-aiff', 'audio/webm']
+    var mimeTypes = [
+      'audio/flac', 'audio/mpeg', 'audio/mp4', 'audio/ogg', 'audio/aac',
+      'audio/x-ms-wma', 'audio/x-aiff', 'audio/webm',
+      // `audio/matroska` is the correct mimetype, but at least as of 2026-04-09,
+      // the detected mimetype for matroska files by the server is `audio/x-matroska`.
+      // ref: https://www.iana.org/assignments/media-types/media-types.xhtml
+      'audio/matroska', 'audio/x-matroska'
+    ]
     var mimeTypeCanPlayMap = {}
     mimeTypes.forEach((mt) => {
       var canPlay = this.player.canPlayType(mt)