diff --git a/paddle/fluid/platform/port.h b/paddle/fluid/platform/port.h
index 4ff07edc19567e27f29ac6614783909e7e55d331..347622f212f842ae5ab06b5bc376754befba8d50 100644
--- a/paddle/fluid/platform/port.h
+++ b/paddle/fluid/platform/port.h
@@ -24,42 +24,42 @@
 #include "glog/logging.h"
 
 #if !defined(_WIN32)
-#define UNUSED __attribute__((unused))
-#include <dlfcn.h>     //  dladdr
-#include <execinfo.h>  // backtrace
-#include <sys/stat.h>
-#include <algorithm>  // std::accumulate
+    #define UNUSED __attribute__((unused))
+    #include <dlfcn.h>     //  dladdr
+    #include <execinfo.h>  // backtrace
+    #include <sys/stat.h>
+    #include <algorithm>  // std::accumulate
 #else
-#include <stdio.h>
-#include <io.h>  // _popen, _pclose
-#include <windows.h>
-#include <numeric>  // std::accumulate in msvc
-// windows version of __attribute__((unused))
-#define UNUSED __pragma(warning(suppress : 4100))
-
-#ifndef S_ISDIR  // windows port for sys/stat.h
-#define S_ISDIR(mode) (((mode)&S_IFMT) == S_IFDIR)
-#endif  // S_ISDIR
-
-static void *dlsym(void *handle, const char *symbol_name) {
-  FARPROC found_symbol;
-  found_symbol = GetProcAddress((HMODULE)handle, symbol_name);
-
-  if (found_symbol == NULL) {
-    throw std::runtime_error(std::string(symbol_name) + " not found.");
-  }
-  return reinterpret_cast<void *>(found_symbol);
-}
+    #include <stdio.h>
+    #include <io.h>  // _popen, _pclose
+    #include <windows.h>
+    #include <numeric>  // std::accumulate in msvc
+    // windows version of __attribute__((unused))
+    #define UNUSED __pragma(warning(suppress : 4100))
+
+    #ifndef S_ISDIR  // windows port for sys/stat.h
+    #define S_ISDIR(mode) (((mode)&S_IFMT) == S_IFDIR)
+    #endif  // S_ISDIR
+
+    static void *dlsym(void *handle, const char *symbol_name) {
+      FARPROC found_symbol;
+      found_symbol = GetProcAddress((HMODULE)handle, symbol_name);
+
+      if (found_symbol == NULL) {
+        throw std::runtime_error(std::string(symbol_name) + " not found.");
+      }
+      return reinterpret_cast<void *>(found_symbol);
+    }
 
-static void *dlopen(const char *filename, int flag) {
-  std::string file_name(filename);
-  file_name.replace(0, file_name.size() - 1, '/', '\\');
-  HMODULE hModule = LoadLibrary(file_name.c_str());
-  if (!hModule) {
-    throw std::runtime_error(file_name + " not found.");
-  }
-  return reinterpret_cast<void *>(hModule);
-}
+    static void *dlopen(const char *filename, int flag) {
+      std::string file_name(filename);
+      file_name.replace(0, file_name.size() - 1, '/', '\\');
+      HMODULE hModule = LoadLibrary(file_name.c_str());
+      if (!hModule) {
+        throw std::runtime_error(file_name + " not found.");
+      }
+      return reinterpret_cast<void *>(hModule);
+    }
 
 #endif  // !_WIN32