diff --git a/framework/core/src/Api/Actions/Discussions/ShowAction.php b/framework/core/src/Api/Actions/Discussions/ShowAction.php
index 95b05a6c6..3d296b754 100644
--- a/framework/core/src/Api/Actions/Discussions/ShowAction.php
+++ b/framework/core/src/Api/Actions/Discussions/ShowAction.php
@@ -92,7 +92,7 @@ class ShowAction extends SerializeResourceAction
 
         $discussion = $this->discussions->findOrFail($request->get('id'), $user);
 
-        $discussion->posts_ids = $discussion->visiblePosts($user)->lists('id');
+        $discussion->posts_ids = $discussion->visiblePosts($user)->orderBy('time')->lists('id');
 
         if (in_array('posts', $request->include)) {
             $length = strlen($prefix = 'posts.');