diff --git a/python/paddle/fluid/layers/nn.py b/python/paddle/fluid/layers/nn.py
index d112793c711f7a21dcf6f8ee79a04a95badd1fd6..16ea7a7ddf725cd60df93c4442c00c308e58d254 100644
--- a/python/paddle/fluid/layers/nn.py
+++ b/python/paddle/fluid/layers/nn.py
@@ -7470,10 +7470,11 @@ def reorg(x, stride, name=None):
                 x=data, stride=2)
     """
 
+    helper = LayerHelper("reorg", **locals())
+
     if not (isinstance(stride, int)):
         raise ValueError("stride must be a python Int")
 
-    helper = LayerHelper("reorg", **locals())
     if name is None:
         out = helper.create_tmp_variable(dtype=x.dtype)
     else: