diff --git a/dashboard-ui/scripts/mediaplayer.js b/dashboard-ui/scripts/mediaplayer.js
index f4ac300c34..be73b4b897 100644
--- a/dashboard-ui/scripts/mediaplayer.js
+++ b/dashboard-ui/scripts/mediaplayer.js
@@ -665,10 +665,6 @@
                 DeviceProfile: deviceProfile
             };
 
-            if (mediaSource) {
-                postData.MediaSource = mediaSource;
-            }
-
             var query = {
                 UserId: Dashboard.getCurrentUserId(),
                 StartTimeTicks: startPosition || 0
@@ -680,6 +676,9 @@
             if (subtitleStreamIndex != null) {
                 query.SubtitleStreamIndex = subtitleStreamIndex;
             }
+            if (mediaSource) {
+                query.MediaSourceId = mediaSource.Id;
+            }
 
             return ApiClient.ajax({
                 url: ApiClient.getUrl('Items/' + itemId + '/PlaybackInfo', query),