diff --git a/paddle/fluid/operators/prelu_op.cc b/paddle/fluid/operators/prelu_op.cc
index b5509e760e8380eb0d85545670d67d346ce3796b..63d12f790ff5bd2b3b157f5ea57bbe8fc464121e 100644
--- a/paddle/fluid/operators/prelu_op.cc
+++ b/paddle/fluid/operators/prelu_op.cc
@@ -136,16 +136,19 @@ There are modes:
         .SetDefault("all");
     AddAttr<bool>("use_mkldnn",
                   "(bool, default false) Only used in mkldnn kernel")
-        .SetDefault(false);
+        .SetDefault(false)
+        .AsExtra();
     AddAttr<std::string>(
         "mkldnn_data_type",
         "(string, default \"float32\"). Data type of mkldnn kernel")
         .SetDefault("float32")
-        .InEnum({"float32", "bfloat16"});
+        .InEnum({"float32", "bfloat16"})
+        .AsExtra();
     AddAttr<bool>("is_test",
                   "(bool, default false) Set to true for inference only, false "
                   "for training. Some layers may run faster when this is true.")
-        .SetDefault(false);
+        .SetDefault(false)
+        .AsExtra();
   }
 };