diff --git a/content/media/TextTrackCue.cpp b/content/media/TextTrackCue.cpp
index 41c0f3189ff..d80920b8483 100644
--- a/content/media/TextTrackCue.cpp
+++ b/content/media/TextTrackCue.cpp
@@ -40,7 +40,7 @@ TextTrackCue::SetDefaultCueSettings()
   mPauseOnExit = false;
   mSnapToLines = true;
   mLine = WEBVTT_AUTO;
-  mAlign = TextTrackCueAlign::Middle;
+  mAlign = AlignSetting::Middle;
   mVertical = DirectionSetting::_empty;
 }
 
diff --git a/content/media/TextTrackCue.h b/content/media/TextTrackCue.h
index 891e4e657be..70f34549131 100644
--- a/content/media/TextTrackCue.h
+++ b/content/media/TextTrackCue.h
@@ -216,12 +216,12 @@ public:
     CueChanged();
   }
 
-  TextTrackCueAlign Align() const
+  AlignSetting Align() const
   {
     return mAlign;
   }
 
-  void SetAlign(TextTrackCueAlign& aAlign)
+  void SetAlign(AlignSetting& aAlign)
   {
     if (mAlign == aAlign)
       return;
@@ -323,7 +323,7 @@ private:
   nsString mRegionId;
   DirectionSetting mVertical;
   int mLine;
-  TextTrackCueAlign mAlign;
+  AlignSetting mAlign;
 
   // Holds the computed DOM elements that represent the parsed cue text.
   // http://www.whatwg.org/specs/web-apps/current-work/#text-track-cue-display-state
diff --git a/dom/webidl/VTTCue.webidl b/dom/webidl/VTTCue.webidl
index 68d9c70316b..7bab05095fb 100644
--- a/dom/webidl/VTTCue.webidl
+++ b/dom/webidl/VTTCue.webidl
@@ -9,9 +9,7 @@
 
 enum AutoKeyword { "auto" };
 
-/* Non-spec: Request to add this enum to spec
- * can be found here: https://www.w3.org/Bugs/Public/show_bug.cgi?id=20996 */
-enum TextTrackCueAlign {
+enum AlignSetting {
   "start",
   "middle",
   "end",
@@ -43,7 +41,7 @@ interface VTTCue : EventTarget {
   attribute long position;
   [SetterThrows]
   attribute long size;
-  attribute TextTrackCueAlign align;
+  attribute AlignSetting align;
   attribute DOMString text;
   DocumentFragment getCueAsHTML();