diff --git a/brutaldon/threadtree.py b/brutaldon/threadtree.py
index ae8e6e3..e58ac4f 100644
--- a/brutaldon/threadtree.py
+++ b/brutaldon/threadtree.py
@@ -20,9 +20,12 @@ def maketree(descendants):
             reps.add(descendant.id)
             reps = getreps(descendant.in_reply_to_account_id)
             reps.add(descendant.id)
+            print("REPLY", descendant.id,
+                  descendant.in_reply_to_id,
+                  descendant.in_reply_to_account_id)
     seen = set()
     def onelevel(reps):
-        for rep in reps:
+        for rep in sorted(reps):
             if rep in seen: continue
             seen.add(rep)
             subreps = replies.get(rep)
@@ -30,7 +33,7 @@ def maketree(descendants):
                 yield lookup[rep], onelevel(subreps)
             else:
                 yield lookup[rep], ()
-    for root in roots:
+    for root in sorted(roots):
         seen.add(root)
         reps = replies.get(root)
         if reps: