diff --git a/lib/media/media_source_engine.js b/lib/media/media_source_engine.js
index aa03fc5066..307c83cb1f 100644
--- a/lib/media/media_source_engine.js
+++ b/lib/media/media_source_engine.js
@@ -739,7 +739,8 @@ shaka.media.MediaSourceEngine = class {
     }
     if (hasClosedCaptions && contentType == ContentType.VIDEO) {
       if (!this.textEngine_) {
-        this.reinitText('text/vtt', this.sequenceMode_);
+        this.reinitText(shaka.util.MimeUtils.CEA608_CLOSED_CAPTION_MIMETYPE,
+            this.sequenceMode_);
       }
       if (!this.captionParser_) {
         this.captionParser_ = this.getCaptionParser(mimeType);
diff --git a/lib/text/text_engine.js b/lib/text/text_engine.js
index 6d30b0b07f..789d4b1471 100644
--- a/lib/text/text_engine.js
+++ b/lib/text/text_engine.js
@@ -139,6 +139,7 @@ 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;
     }