diff --git a/common/src/main/java/ctbrec/recorder/download/hls/HlsDownload.java b/common/src/main/java/ctbrec/recorder/download/hls/HlsDownload.java
index 365e738e..fbb8fa9c 100644
--- a/common/src/main/java/ctbrec/recorder/download/hls/HlsDownload.java
+++ b/common/src/main/java/ctbrec/recorder/download/hls/HlsDownload.java
@@ -129,6 +129,9 @@ public class HlsDownload extends AbstractHlsDownload {
         if (questionMarkPosition > 0) {
             prefixedFileName = prefixedFileName.substring(0, questionMarkPosition);
         }
+        if (!prefixedFileName.endsWith(".ts")) {
+            prefixedFileName += ".ts";
+        }
         File file = FileSystems.getDefault().getPath(downloadDir.toAbsolutePath().toString(), prefixedFileName).toFile();
         return new FileOutputStream(file);
     }