diff --git a/components/dfs/include/dfs.h b/components/dfs/include/dfs.h
index f1ea7fa1a..b402be795 100644
--- a/components/dfs/include/dfs.h
+++ b/components/dfs/include/dfs.h
@@ -29,7 +29,6 @@
 #include <stdint.h>
 #include <stdlib.h>
 #include <string.h>
-#include <sys/types.h>
 
 #include <time.h>
 #include <rtthread.h>
diff --git a/components/libc/compilers/armlibc/sys/types.h b/components/libc/compilers/armlibc/sys/types.h
index 3074bd69d..b01d8283d 100644
--- a/components/libc/compilers/armlibc/sys/types.h
+++ b/components/libc/compilers/armlibc/sys/types.h
@@ -9,6 +9,4 @@ typedef rt_int32_t key_t;       /* Used for interprocess communication. */
 typedef rt_int32_t pid_t;       /* Used for process IDs and process group IDs. */
 typedef signed long ssize_t;    /* Used for a count of bytes or an error indication. */
 
-typedef int mode_t;
-
 #endif
diff --git a/components/libc/compilers/dlib/sys/types.h b/components/libc/compilers/dlib/sys/types.h
index 3074bd69d..b01d8283d 100644
--- a/components/libc/compilers/dlib/sys/types.h
+++ b/components/libc/compilers/dlib/sys/types.h
@@ -9,6 +9,4 @@ typedef rt_int32_t key_t;       /* Used for interprocess communication. */
 typedef rt_int32_t pid_t;       /* Used for process IDs and process group IDs. */
 typedef signed long ssize_t;    /* Used for a count of bytes or an error indication. */
 
-typedef int mode_t;
-
 #endif
diff --git a/include/rtlibc.h b/include/rtlibc.h
index 757329a22..a66d67698 100644
--- a/include/rtlibc.h
+++ b/include/rtlibc.h
@@ -36,6 +36,7 @@
 
 #if defined(__CC_ARM) || defined(__IAR_SYSTEMS_ICC__)
 typedef signed long off_t;
+typedef int mode_t;
 #endif
 
 #if defined(__MINGW32__)