diff --git a/mindspore/lite/internal/include/ms_tensor.h b/mindspore/lite/internal/include/ms_tensor.h
index f395e662c1..e261e3ab91 100644
--- a/mindspore/lite/internal/include/ms_tensor.h
+++ b/mindspore/lite/internal/include/ms_tensor.h
@@ -137,13 +137,13 @@ typedef struct MSTensor {
   /// \return Byte size of data in MSTensor.
   size_t Size() const;
 
-  static void *operator new(std::size_t sz);
+  static void *operator new(size_t sz);
 
-  static void *operator new[](std::size_t sz);
+  static void *operator new[](size_t sz);
 
-  static void operator delete(void *ptr, std::size_t sz);
+  static void operator delete(void *ptr, size_t sz);
 
-  static void operator delete[](void *ptr, std::size_t sz);
+  static void operator delete[](void *ptr, size_t sz);
 } MSTensor;
 
 MSTensor *CreateTensor(TypeId data_type, const ShapeVector &shape);
diff --git a/mindspore/lite/internal/src/ms_tensor.cc b/mindspore/lite/internal/src/ms_tensor.cc
index b2f853ac98..c5cd3afe93 100644
--- a/mindspore/lite/internal/src/ms_tensor.cc
+++ b/mindspore/lite/internal/src/ms_tensor.cc
@@ -204,16 +204,16 @@ int MSTensor::ElementsC4Num() const {
   return result;
 }
 
-void *MSTensor::operator new(std::size_t sz) {
+void *MSTensor::operator new(size_t sz) {
   void *storage = malloc(sz);
   return storage;
 }
 
-void *MSTensor::operator new[](std::size_t sz) {
+void *MSTensor::operator new[](size_t sz) {
   void *storage = malloc(sz);
   return storage;
 }
 
-void MSTensor::operator delete(void *ptr, std::size_t sz) { free(ptr); }
+void MSTensor::operator delete(void *ptr, size_t sz) { free(ptr); }
 
-void MSTensor::operator delete[](void *ptr, std::size_t sz) { free(ptr); }
+void MSTensor::operator delete[](void *ptr, size_t sz) { free(ptr); }