diff --git a/components/libc/compilers/newlib/syscalls.c b/components/libc/compilers/newlib/syscalls.c
index d751ab17b82a6373ef410d9939e93b729b643564..3eabad9b559783f23d0156fc8ce4d5027c472591 100644
--- a/components/libc/compilers/newlib/syscalls.c
+++ b/components/libc/compilers/newlib/syscalls.c
@@ -79,12 +79,6 @@ _fstat_r(struct _reent *ptr, int fd, struct stat *pstat)
     return -1;
 }
 
-int
-_getpid_r(struct _reent *ptr)
-{
-    return 0;
-}
-
 int
 _isatty_r(struct _reent *ptr, int fd)
 {
@@ -335,7 +329,10 @@ int flock(int fd, int operation)
 }
 
 /*
-These functions will be implemented and replaced by the 'common/time.c' file
+These functions are implemented and replaced by the 'common/time.c' file
 int _gettimeofday_r(struct _reent *ptr, struct timeval *__tp, void *__tzp);
 _CLOCK_T_  _times_r(struct _reent *ptr, struct tms *ptms);
+
+These functions are implemented and replaced by the "common/unistd.c" file
+int _getpid_r(struct _reent *ptr);
 */