diff --git a/lib/media/media_source_engine.js b/lib/media/media_source_engine.js
index 2c3e703c9de..d4c1be4f281 100644
--- a/lib/media/media_source_engine.js
+++ b/lib/media/media_source_engine.js
@@ -559,7 +559,8 @@ shaka.media.MediaSourceEngine = class {
       // For HLS CEA-608/708 CLOSED-CAPTIONS, text data is embedded in
       // the video stream, so textEngine may not have been initialized.
       if (!this.textEngine_) {
-        this.reinitText('text/vtt', this.sequenceMode_);
+        this.reinitText(shaka.util.MimeUtils.CEA608_CLOSED_CAPTION_MIMETYPE,
+            this.sequenceMode_);
       }
 
       if (transmuxedData.metadata) {