--- a/dom/media/omx/MediaOmxReader.cpp
+++ b/dom/media/omx/MediaOmxReader.cpp
@@ -284,17 +284,17 @@ void MediaOmxReader::HandleResourceAlloc
                                     &width, &height);
     nsIntRect pictureRect(0, 0, width, height);
 
     // Validate the container-reported frame and pictureRect sizes. This ensures
     // that our video frame creation code doesn't overflow.
     nsIntSize displaySize(displayWidth, displayHeight);
     nsIntSize frameSize(width, height);
     if (!IsValidVideoRegion(frameSize, pictureRect, displaySize)) {
-      mMetadataPromise.RejectNS_ERROR_DOM_MEDIA_METADATA_ERR, __func__);
+      mMetadataPromise.Reject(NS_ERROR_DOM_MEDIA_METADATA_ERR, __func__);
       return;
     }
 
     // Video track's frame sizes will not overflow. Activate the video track.
     mHasVideo = true;
     mInfo.mVideo.mDisplay = displaySize;
     mPicture = pictureRect;
     mInitialFrame = frameSize;