diff --git a/ankiqt/ui/cardlist.py b/ankiqt/ui/cardlist.py
index bbbc14f0a..deab6aa47 100644
--- a/ankiqt/ui/cardlist.py
+++ b/ankiqt/ui/cardlist.py
@@ -106,7 +106,7 @@ class DeckModel(QAbstractTableModel):
         d = {'str': [],
              'tag': [],
              }
-        for elem in search.split():
+        for elem in search.split(" "):
             if len(elem) > 2 and elem.startswith("t:"):
                 d['tag'].append(elem[2:])
             else: