diff --git a/paddle/utils/pybind.cc b/paddle/utils/pybind.cc
index 24b1c4f65c3e2b8b236aba3f5348edd62810f4bf..7e93dcff1400ae9e57960e66be0fdb078d782155 100644
--- a/paddle/utils/pybind.cc
+++ b/paddle/utils/pybind.cc
@@ -21,8 +21,8 @@ DECLARE_string(tensor_operants_mode);
 namespace paddle {
 namespace pybind {
 
-PyTypeObject* p_tensor_type;
-PyTypeObject* p_string_tensor_type;
+PyTypeObject* p_tensor_type = nullptr;
+PyTypeObject* p_string_tensor_type = nullptr;
 
 bool PyCheckTensor(PyObject* obj) {
   if (!p_tensor_type) {
diff --git a/paddle/utils/pybind.h b/paddle/utils/pybind.h
index 4c4ef296a4ed6204f45e6796644c5ddcd75d09fc..c065a8de223cc9ff7a682c18d503c84c4d439729 100644
--- a/paddle/utils/pybind.h
+++ b/paddle/utils/pybind.h
@@ -24,8 +24,6 @@ namespace py = pybind11;
 namespace paddle {
 namespace pybind {
 
-extern PyTypeObject* p_tensor_type;
-
 typedef struct {
   PyObject_HEAD paddle::Tensor tensor;
   // Weak references