diff --git a/anki/sched.py b/anki/sched.py
index 0d91d37df..21c900387 100644
--- a/anki/sched.py
+++ b/anki/sched.py
@@ -265,8 +265,8 @@ order by due""" % self._deckLimit(),
             conf = self.col.decks.confForDid(did)
             deck = self.col.decks.get(did)
             if not conf['dyn']:
-                rev = min(rev, conf['rev']['perDay']-deck['revToday'][1])
-                new = min(new, conf['new']['perDay']-deck['newToday'][1])
+                rev = max(0, min(rev, conf['rev']['perDay']-deck['revToday'][1]))
+                new = max(0, min(new, conf['new']['perDay']-deck['newToday'][1]))
             tree.append((head, did, rev, lrn, new, children))
         return tuple(tree)