diff --git a/components/lwp/lwp_syscall.c b/components/lwp/lwp_syscall.c
index 47b282855850201202646149fd71e1b02173ecb5..2324b447f59eca30b3323a60143017a78624970a 100644
--- a/components/lwp/lwp_syscall.c
+++ b/components/lwp/lwp_syscall.c
@@ -358,7 +358,7 @@ int sys_open(const char *name, int flag, ...)
 /* syscall: "close" ret: "int" args: "int" */
 int sys_close(int fd)
 {
-    if ((0 <= fd) && (fd <= 2))
+    if ((0 <= fd) && (fd <= DFS_FD_OFFSET))
     {
         return 0;
     }