diff --git a/VERSION b/VERSION
index 8b3c19e6..4c55dd4b 100644
--- a/VERSION
+++ b/VERSION
@@ -1 +1 @@
-Version 2.2.1 (2012-11-06 10:36:39) stable
+Version 2.2.1 (2012-11-06 14:26:21) stable
diff --git a/gluon/dal.py b/gluon/dal.py
index a8dae8d6..e910aa95 100644
--- a/gluon/dal.py
+++ b/gluon/dal.py
@@ -1199,7 +1199,7 @@ class BaseAdapter(ConnectionPool):
     def BELONGS(self, first, second):
         if isinstance(second, str):
             return '(%s IN (%s))' % (self.expand(first), second[:-1])
-        elif second==[] or second==():
+        elif not second:
             return '(1=0)'
         items = ','.join(self.expand(item, first.type) for item in second)
         return '(%s IN (%s))' % (self.expand(first), items)