diff --git a/components/libc/compilers/common/sys/ioctl.h b/components/libc/compilers/common/sys/ioctl.h
index 29ed3a8b84..a1642199b1 100644
--- a/components/libc/compilers/common/sys/ioctl.h
+++ b/components/libc/compilers/common/sys/ioctl.h
@@ -7,8 +7,8 @@
  * Date           Author       Notes
  * 2020-09-01     Meco Man     First Version
  */
-#ifndef _SYS_IOCTL_H
-#define _SYS_IOCTL_H
+#ifndef __SYS_IOCTL_H__
+#define __SYS_IOCTL_H__
 
 #include <rtconfig.h>
 #include <dfs_posix.h>
diff --git a/components/libc/posix/Kconfig b/components/libc/posix/Kconfig
index 52b5fdc948..4534da7118 100644
--- a/components/libc/posix/Kconfig
+++ b/components/libc/posix/Kconfig
@@ -30,7 +30,7 @@ if RT_USING_POSIX_FS
         bool "Enable Asynchronous I/O <aio.h>"
         default n
 
-    config RT_USING_POSIX_MMAP
+    config RT_USING_POSIX_MMAN
         bool "Enable Memory-Mapped I/O <sys/mman.h>"
         default n
 endif
diff --git a/components/libc/posix/io/SConscript b/components/libc/posix/io/SConscript
index 2a7cd76ded..32654674e8 100644
--- a/components/libc/posix/io/SConscript
+++ b/components/libc/posix/io/SConscript
@@ -18,10 +18,6 @@ if GetDepend('RT_USING_POSIX_SELECT'):
     src += ['select.c']
     flag = True
 
-if GetDepend('RT_USING_POSIX_MMAP'):
-    src += ['mmap.c']
-    flag = True
-
 if flag == True:
     group = DefineGroup('POSIX', src, depend = [], CPPPATH = CPPPATH)
 
diff --git a/components/libc/posix/io/mman/SConscript b/components/libc/posix/io/mman/SConscript
new file mode 100644
index 0000000000..7dd096c998
--- /dev/null
+++ b/components/libc/posix/io/mman/SConscript
@@ -0,0 +1,11 @@
+# RT-Thread building script for component
+
+from building import *
+
+cwd     = GetCurrentDir()
+src     = ['mman.c']
+CPPPATH = [cwd]
+
+group = DefineGroup('POSIX', src, depend = ['RT_USING_POSIX_MMAN'], CPPPATH = CPPPATH)
+
+Return('group')
diff --git a/components/libc/posix/io/mmap.c b/components/libc/posix/io/mman/mman.c
similarity index 98%
rename from components/libc/posix/io/mmap.c
rename to components/libc/posix/io/mman/mman.c
index e68b82e640..827f2cbb14 100644
--- a/components/libc/posix/io/mmap.c
+++ b/components/libc/posix/io/mman/mman.c
@@ -14,7 +14,7 @@
 #include <rtthread.h>
 #include <dfs_posix.h>
 
-#include <sys/mman.h>
+#include "sys/mman.h"
 
 void *mmap(void *addr, size_t length, int prot, int flags,
     int fd, off_t offset)
diff --git a/components/libc/compilers/common/sys/mman.h b/components/libc/posix/io/mman/sys/mman.h
similarity index 96%
rename from components/libc/compilers/common/sys/mman.h
rename to components/libc/posix/io/mman/sys/mman.h
index 2da2ddf716..a730f33b6b 100644
--- a/components/libc/compilers/common/sys/mman.h
+++ b/components/libc/posix/io/mman/sys/mman.h
@@ -8,8 +8,8 @@
  * 2017/11/30     Bernard      The first version.
  */
 
-#ifndef _SYS_MMAN_H
-#define _SYS_MMAN_H
+#ifndef __SYS_MMAN_H__
+#define __SYS_MMAN_H__
 
 #ifdef __cplusplus
 extern "C" {
diff --git a/components/libc/posix/io/poll/poll.c b/components/libc/posix/io/poll/poll.c
index 0c773b306c..a1500ba109 100644
--- a/components/libc/posix/io/poll/poll.c
+++ b/components/libc/posix/io/poll/poll.c
@@ -12,7 +12,7 @@
 #include <rthw.h>
 #include <rtthread.h>
 #include <dfs_file.h>
-#include <poll.h>
+#include "poll.h"
 
 struct rt_poll_node;