diff --git a/lib/newfol/database.py b/lib/newfol/database.py
index 80b7f0b..341f404 100644
--- a/lib/newfol/database.py
+++ b/lib/newfol/database.py
@@ -439,7 +439,7 @@ class Database:
         if self._needs_upgrade:
             raise newfol.exception.UpgradeError("Database needs upgrading")
         if select is not None:
-            return filter(select, self._records)
+            return list(filter(select, self._records))
         return self._records
     def location(self):
         return self._location
diff --git a/test/testdatabase.py b/test/testdatabase.py
index 4977cf4..baf126d 100755
--- a/test/testdatabase.py
+++ b/test/testdatabase.py
@@ -176,6 +176,7 @@ class TestDatabaseFiltering(unittest.TestCase):
                     return False
             return True
         selected = db.records(has_only_numbers)
+        self.assertEqual(type(selected), list)
         self.assertEqual(set(selected), set(records[1:]))
         ddir.cleanup()