diff --git a/paddle/framework/op_registry.h b/paddle/framework/op_registry.h
index a561b5f48e27b80ed38a08b584808fade4e74f31..23f641cba2b2a22f12b439577732e987fe3ba66c 100644
--- a/paddle/framework/op_registry.h
+++ b/paddle/framework/op_registry.h
@@ -222,6 +222,9 @@ class OpRegistry {
         varmap[var.name()] = idx++;
       }
       // ================================================ //
+    } else {
+      op_info.proto_ = nullptr;
+      op_info.checker_ = nullptr;
     }
     op_info_map().insert(std::make_pair(op_type, op_info));
     // register gradient op
diff --git a/paddle/framework/pybind.cc b/paddle/framework/pybind.cc
index 3343a51c8d387b7e8d62a36b2d5c61f3fd22cece..56a89d87fd83401b55db2603034f3016149a429a 100644
--- a/paddle/framework/pybind.cc
+++ b/paddle/framework/pybind.cc
@@ -176,6 +176,9 @@ All parameter, weight, gradient are variables in Paddle.
     std::vector<py::bytes> ret_values;
     for (auto it = op_info_map.begin(); it != op_info_map.end(); ++it) {
       const OpProto *proto = it->second.proto_;
+      if (proto == nullptr) {
+        continue;
+      }
       PADDLE_ENFORCE(proto->IsInitialized(), "OpProto must all be initialized");
       std::string str;
       PADDLE_ENFORCE(proto->SerializeToString(&str),