diff --git a/src/framework/load_ops.h b/src/framework/load_ops.h
index 6423a6ffeedd2f08f45265350b1312ca65abbb7e..a2a6da34849641b4f99310621445cb312c7d5227 100644
--- a/src/framework/load_ops.h
+++ b/src/framework/load_ops.h
@@ -36,7 +36,7 @@ limitations under the License. */
 #define LOAD_FPGA_OP(op_type)                                           \
   extern int TouchOpRegistrar_##op_type##_##fpga();                     \
   static int use_op_itself_##op_type##_##fpga __attribute__((unused)) = \
-      TouchOpRegistrar_##op_type##_##mali_gpu()
+      TouchOpRegistrar_##op_type##_##fpga()
 #else
 #define LOAD_FPGA_OP(op_type)
 #endif
diff --git a/src/io/executor.cpp b/src/io/executor.cpp
index 66a70006dc22076d9f8ec155b3522bbc4ae3e1e2..c7e6c783bb227c75dd394fcecf5c03e83c81b252 100644
--- a/src/io/executor.cpp
+++ b/src/io/executor.cpp
@@ -398,7 +398,7 @@ std::vector<typename Executor<Dtype, P>::Ptype> Executor<Dtype, P>::Predict(
 #ifdef PADDLE_MOBILE_FPGA
 template <typename Dtype, Precision P>
 void Executor<Dtype, P>::InjectVariable(const framework::Tensor &t,
-                                        string var_name) {
+                                        std::string var_name) {
   framework::Variable *g_feed_value = program_.scope->Var(var_name);
   framework::Tensor *feed_tensor =
       g_feed_value->GetMutable<framework::LoDTensor>();
diff --git a/src/io/executor.h b/src/io/executor.h
index 35b3c51740e21357865a119de05b58f7008e3db8..98906749effb7e46318157085c4505c57726ec62 100644
--- a/src/io/executor.h
+++ b/src/io/executor.h
@@ -59,7 +59,7 @@ class Executor {
                              const std::vector<int64_t> &dims);
 
 #ifdef PADDLE_MOBILE_FPGA
-  void InjectVariable(const framework::Tensor &t, string var_name);
+  void InjectVariable(const framework::Tensor &t, std::string var_name);
   void FeedData(const framework::Tensor &t);
   std::shared_ptr<framework::Tensor> FetchResult(int id = -1);
   void Predict_From_To(int start = 0, int end = -1);
diff --git a/src/io/paddle_mobile.cpp b/src/io/paddle_mobile.cpp
index 52dbe272794a569b5237d134f82099c01c330730..ec1fd1af45319192585f60fa1f90500fa2deaf46 100644
--- a/src/io/paddle_mobile.cpp
+++ b/src/io/paddle_mobile.cpp
@@ -127,7 +127,7 @@ PaddleMobile<Dtype, P>::~PaddleMobile() {
 
 template <typename Dtype, Precision P>
 void PaddleMobile<Dtype, P>::InjectVariable(const framework::Tensor &t,
-                                            string var_name) {
+                                            std::string var_name) {
   executor_->InjectVariable(t, var_name);
 }
 
diff --git a/src/io/paddle_mobile.h b/src/io/paddle_mobile.h
index eeff44c8e5578601df80dd134becfd483e33e238..e0ff51d246b179e3f91e1c94f3b26c5ff9ba3d8f 100644
--- a/src/io/paddle_mobile.h
+++ b/src/io/paddle_mobile.h
@@ -60,7 +60,7 @@ class PaddleMobile {
   ~PaddleMobile();
 
 #ifdef PADDLE_MOBILE_FPGA
-  void InjectVariable(const framework::Tensor &t, string var_name);
+  void InjectVariable(const framework::Tensor &t, std::string var_name);
   void FeedData(const framework::Tensor &t);
   std::shared_ptr<framework::Tensor> FetchResult(int id = -1);
   void Predict_From_To(int start = 0, int end = -1);