diff --git a/classes/VideoDownload.php b/classes/VideoDownload.php
index d94dd85..345d2eb 100644
--- a/classes/VideoDownload.php
+++ b/classes/VideoDownload.php
@@ -265,6 +265,9 @@ class VideoDownload
         }
 
         $video = $this->getJSON($url, $format, $password);
+        if (in_array($video->protocol, ['m3u8', 'm3u8_native'])) {
+            throw(new \Exception('Conversion of M3U8 files is not supported.'));
+        }
 
         //Vimeo needs a correct user-agent
         ini_set(
diff --git a/tests/VideoDownloadTest.php b/tests/VideoDownloadTest.php
index a95a636..1481793 100644
--- a/tests/VideoDownloadTest.php
+++ b/tests/VideoDownloadTest.php
@@ -330,4 +330,15 @@ class VideoDownloadTest extends \PHPUnit_Framework_TestCase
         $config->rtmpdump = 'foobar';
         $this->download->getAudioStream($url, $format);
     }
+
+    /**
+     * Test getAudioStream function with a M3U8 file.
+     *
+     * @return void
+     * @expectedException Exception
+     */
+    public function testGetAudioStreamM3uError()
+    {
+        $this->download->getAudioStream('https://twitter.com/verge/status/813055465324056576/video/1', 'best');
+    }
 }