diff --git a/doc/fluid/user_guides/cv_case/gan/network.py b/doc/fluid/user_guides/cv_case/gan/network.py
index b030e1190497741e3ab39de129e42551c6d52a83..6f0e85f4a81ff6938ec20f2cc4b8c63dffdc235a 100644
--- a/doc/fluid/user_guides/cv_case/gan/network.py
+++ b/doc/fluid/user_guides/cv_case/gan/network.py
@@ -91,7 +91,7 @@ def conv_cond_concat(x, y):
     """Concatenate conditioning vector on feature map axis."""
     x_shape = fluid.layers.shape(x)
     ones = fluid.layers.fill_constant(
-        x, [x_shape[0], y.shape[1], x.shape[2], x.shape[3]], "float32", 1.0)
+        [x_shape[0], y.shape[1], x.shape[2], x.shape[3]], "float32", 1.0)
     return fluid.layers.concat([x, ones * y], 1)