diff --git a/wanikaniburned.py b/wanikaniburned.py
index be7432a..2f2696d 100644
--- a/wanikaniburned.py
+++ b/wanikaniburned.py
@@ -186,13 +186,13 @@ def show_quiz():
 @login_required
 def get_items():
     level_range = list(range(0, 61))
-    if flask.request.args.get('level_range') is not '':
+    if flask.request.args.get('level_range') and flask.request.args.get('level_range') is not '':
         level_range = parse_range(flask.request.args.get('level_range'))
     item_state = ['burned']
-    if flask.request.args.get('item_state') is not '':
+    if flask.request.args.get('item_state') and flask.request.args.get('item_state') is not '':
         item_state = flask.request.args.get('item_state').split(',')
     item_types = ['radical', 'kanji', 'vocab']
-    if flask.request.args.get('item_types') is not '':
+    if flask.request.args.get('item_types') and flask.request.args.get('item_types') is not '':
         item_types = flask.request.args.get('item_types').split(',')
     return get_items_with_level_restriction(level_range, item_state, item_types)