diff --git a/brutaldon/threadtree.py b/brutaldon/threadtree.py
index a429e48..de3669c 100644
--- a/brutaldon/threadtree.py
+++ b/brutaldon/threadtree.py
@@ -5,7 +5,6 @@ def maketree(descendants):
     replies = {}
     roots = set()
     for descendant in descendants:
-        pprint(descendant)
         if not descendant.in_reply_to_id:
             roots.add(descendant.id)
         if descendant.in_reply_to_id in replies:
@@ -54,4 +53,6 @@ def unmaketree(tree):
             yield OUT
 
 def build(descendants):
-    return unmaketree(maketree(descendants))
+    yield IN
+    yield from unmaketree(maketree(descendants))
+    yield OUT
diff --git a/brutaldon/views.py b/brutaldon/views.py
index f8f55db..ca5e389 100644
--- a/brutaldon/views.py
+++ b/brutaldon/views.py
@@ -700,7 +700,7 @@ def thread(request, id):
             "context": context,
             "toot": toot,
             "root": root,
-            "posts": threadtree.build(descendants),
+            "posts": tuple(threadtree.build(descendants)),
             "own_acct": request.session["active_user"],
             "notifications": notifications,
             "preferences": account.preferences,