diff --git a/anki/sched.py b/anki/sched.py
index d49507080..0d6415d5a 100644
--- a/anki/sched.py
+++ b/anki/sched.py
@@ -954,7 +954,7 @@ select id from cards where did in %s and queue = 2 and due <= ? limit ?)"""
     def _fillDyn(self, deck):
         search, limit, order = deck['terms'][0]
         orderlimit = self._dynOrder(order, limit)
-        search += " -is:suspended -is:buried -deck:filtered"
+        search = "(%s) -is:suspended -is:buried -deck:filtered" % search
         try:
             ids = self.col.findCards(search, order=orderlimit)
         except: