diff --git a/python/paddle/v2/parameters.py b/python/paddle/v2/parameters.py
index 05dc5c68dd97b00fb15b74564a32313430c45345..d686d09f220671fce50be0784e354f97cb109f32 100644
--- a/python/paddle/v2/parameters.py
+++ b/python/paddle/v2/parameters.py
@@ -159,7 +159,8 @@ class Parameters(object):
         if not self.has_key(key):
             raise ValueError("No such parameter %s" % key)
         conf = self.__param_conf__[key]
-        return tuple(map(int, conf.dims))
+        dims = conf.dims if conf.dims else (1, conf.size)
+        return tuple(map(int, dims))
 
     def __setitem__(self, key, value):
         """