diff --git a/lib/media/media_source_engine.js b/lib/media/media_source_engine.js
index 9b25bfce41..2922d058e9 100644
--- a/lib/media/media_source_engine.js
+++ b/lib/media/media_source_engine.js
@@ -518,7 +518,7 @@ 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.reinitText(shaka.util.MimeUtils.CEA608_CLOSED_CAPTION_MIMETYPE);
       }
 
       if (transmuxedData.metadata) {
@@ -545,7 +545,7 @@ shaka.media.MediaSourceEngine = class {
           contentType, () => this.append_(contentType, transmuxedSegment));
     } else if (hasClosedCaptions) {
       if (!this.textEngine_) {
-        this.reinitText('text/vtt');
+        this.reinitText(shaka.util.MimeUtils.CEA608_CLOSED_CAPTION_MIMETYPE);
       }
       // If it is the init segment for closed captions, initialize the closed
       // caption parser.
diff --git a/lib/text/text_engine.js b/lib/text/text_engine.js
index 2a125da694..861fd11cbb 100644
--- a/lib/text/text_engine.js
+++ b/lib/text/text_engine.js
@@ -134,6 +134,7 @@ shaka.text.TextEngine = class {
     // into TextEngine and TextDisplayer.
     if (mimeType == shaka.util.MimeUtils.CEA608_CLOSED_CAPTION_MIMETYPE ||
         mimeType == shaka.util.MimeUtils.CEA708_CLOSED_CAPTION_MIMETYPE) {
+      this.parser_ = null;
       return;
     }