diff --git a/CMakeLists.txt b/CMakeLists.txt
index 5bc7c34fa..2906f9180 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -14,4 +14,4 @@ set(CMAKE_POSITION_INDEPENDENT_CODE ON)
 option(BUILD_SOX "Build libsox statically" ON)
 
 add_subdirectory(paddlespeech/audio/third_party)
-add_subdirectory(paddlespeech/audio//csrc)
+add_subdirectory(paddlespeech/audio/src)
diff --git a/paddlespeech/audio/csrc/CMakeLists.txt b/paddlespeech/audio/src/CMakeLists.txt
similarity index 100%
rename from paddlespeech/audio/csrc/CMakeLists.txt
rename to paddlespeech/audio/src/CMakeLists.txt
diff --git a/paddlespeech/audio/csrc/pybind/kaldi_frontend/CMakeLists.txt b/paddlespeech/audio/src/pybind/kaldi_frontend/CMakeLists.txt
similarity index 86%
rename from paddlespeech/audio/csrc/pybind/kaldi_frontend/CMakeLists.txt
rename to paddlespeech/audio/src/pybind/kaldi_frontend/CMakeLists.txt
index 7cb240aab..b9212210a 100644
--- a/paddlespeech/audio/csrc/pybind/kaldi_frontend/CMakeLists.txt
+++ b/paddlespeech/audio/src/pybind/kaldi_frontend/CMakeLists.txt
@@ -1,6 +1,4 @@
 
-cmake_minimum_required(VERSION 3.14 FATAL_ERROR)
-
 include_directories(
 ${CMAKE_CURRENT_SOURCE_DIR}
 )
diff --git a/paddlespeech/audio/csrc/pybind/kaldi_frontend/feature_common.h b/paddlespeech/audio/src/pybind/kaldi_frontend/feature_common.h
similarity index 100%
rename from paddlespeech/audio/csrc/pybind/kaldi_frontend/feature_common.h
rename to paddlespeech/audio/src/pybind/kaldi_frontend/feature_common.h
diff --git a/paddlespeech/audio/csrc/pybind/kaldi_frontend/feature_common_inl.h b/paddlespeech/audio/src/pybind/kaldi_frontend/feature_common_inl.h
similarity index 100%
rename from paddlespeech/audio/csrc/pybind/kaldi_frontend/feature_common_inl.h
rename to paddlespeech/audio/src/pybind/kaldi_frontend/feature_common_inl.h
diff --git a/paddlespeech/audio/csrc/pybind/kaldi_frontend/kaldi_feature.cc b/paddlespeech/audio/src/pybind/kaldi_frontend/kaldi_feature.cc
similarity index 100%
rename from paddlespeech/audio/csrc/pybind/kaldi_frontend/kaldi_feature.cc
rename to paddlespeech/audio/src/pybind/kaldi_frontend/kaldi_feature.cc
diff --git a/paddlespeech/audio/csrc/pybind/kaldi_frontend/kaldi_feature.h b/paddlespeech/audio/src/pybind/kaldi_frontend/kaldi_feature.h
similarity index 100%
rename from paddlespeech/audio/csrc/pybind/kaldi_frontend/kaldi_feature.h
rename to paddlespeech/audio/src/pybind/kaldi_frontend/kaldi_feature.h
diff --git a/paddlespeech/audio/csrc/pybind/kaldi_frontend/kaldi_feature_wrapper.cc b/paddlespeech/audio/src/pybind/kaldi_frontend/kaldi_feature_wrapper.cc
similarity index 100%
rename from paddlespeech/audio/csrc/pybind/kaldi_frontend/kaldi_feature_wrapper.cc
rename to paddlespeech/audio/src/pybind/kaldi_frontend/kaldi_feature_wrapper.cc
diff --git a/paddlespeech/audio/csrc/pybind/kaldi_frontend/kaldi_feature_wrapper.h b/paddlespeech/audio/src/pybind/kaldi_frontend/kaldi_feature_wrapper.h
similarity index 100%
rename from paddlespeech/audio/csrc/pybind/kaldi_frontend/kaldi_feature_wrapper.h
rename to paddlespeech/audio/src/pybind/kaldi_frontend/kaldi_feature_wrapper.h
diff --git a/paddlespeech/audio/csrc/pybind/pybind.cpp b/paddlespeech/audio/src/pybind/pybind.cpp
similarity index 100%
rename from paddlespeech/audio/csrc/pybind/pybind.cpp
rename to paddlespeech/audio/src/pybind/pybind.cpp
diff --git a/paddlespeech/audio/csrc/pybind/sox/io.cpp b/paddlespeech/audio/src/pybind/sox/io.cpp
similarity index 100%
rename from paddlespeech/audio/csrc/pybind/sox/io.cpp
rename to paddlespeech/audio/src/pybind/sox/io.cpp
diff --git a/paddlespeech/audio/csrc/pybind/sox/io.h b/paddlespeech/audio/src/pybind/sox/io.h
similarity index 100%
rename from paddlespeech/audio/csrc/pybind/sox/io.h
rename to paddlespeech/audio/src/pybind/sox/io.h
diff --git a/paddlespeech/audio/csrc/pybind/sox/utils.cpp b/paddlespeech/audio/src/pybind/sox/utils.cpp
similarity index 100%
rename from paddlespeech/audio/csrc/pybind/sox/utils.cpp
rename to paddlespeech/audio/src/pybind/sox/utils.cpp
diff --git a/paddlespeech/audio/csrc/pybind/sox/utils.h b/paddlespeech/audio/src/pybind/sox/utils.h
similarity index 100%
rename from paddlespeech/audio/csrc/pybind/sox/utils.h
rename to paddlespeech/audio/src/pybind/sox/utils.h
diff --git a/paddlespeech/audio/third_party/kaldi/CMakeLists.txt b/paddlespeech/audio/third_party/kaldi/CMakeLists.txt
index d68540cb4..66346a268 100644
--- a/paddlespeech/audio/third_party/kaldi/CMakeLists.txt
+++ b/paddlespeech/audio/third_party/kaldi/CMakeLists.txt
@@ -1,6 +1,5 @@
 project(kaldi)
 
-
 add_library(kaldi-base  
   base/io-funcs.cc
   base/kaldi-error.cc
diff --git a/speechx/speechx/kaldi/base/kaldi-types.h b/speechx/speechx/kaldi/base/kaldi-types.h
index 23ef4c4c5..351366f1f 100644
--- a/speechx/speechx/kaldi/base/kaldi-types.h
+++ b/speechx/speechx/kaldi/base/kaldi-types.h
@@ -42,7 +42,7 @@ typedef float   BaseFloat;
 // for discussion on what to do if you need compile kaldi
 // without OpenFST, see the bottom of this this file
 
-#ifndef COMPILE_WITHOUT_OPENFST 
+#if (COMPILE_WITHOUT_OPENFST != 0)
 
 #include <fst/types.h>