diff --git a/include/fast_io_hosted/process/process/posix.h b/include/fast_io_hosted/process/process/posix.h
index 8a79c9f2..cc608b9f 100644
--- a/include/fast_io_hosted/process/process/posix.h
+++ b/include/fast_io_hosted/process/process/posix.h
@@ -9,13 +9,13 @@ namespace fast_io
 namespace posix
 {
 #if defined(__DARWIN_C_LEVEL) || defined(__MSDOS__)
-extern int libc_faccessat(int dirfd, char const *pathname, int mode, int flags) noexcept __asm__("_faccessat");
+// extern int libc_faccessat(int dirfd, char const *pathname, int mode, int flags) noexcept __asm__("_faccessat");
 extern int libc_fexecve(int fd, char *const *argv, char *const *envp) noexcept __asm__("_fexecve");
 extern int libc_kill(pid_t pid, int sig) noexcept __asm__("_kill");
 extern pid_t libc_vfork() noexcept __asm__("_vfork");
 [[noreturn]] extern void libc_exit(int exit) noexcept __asm__("_exit");
 #else
-extern int libc_faccessat(int dirfd, char const *pathname, int mode, int flags) noexcept __asm__("faccessat");
+// extern int libc_faccessat(int dirfd, char const *pathname, int mode, int flags) noexcept __asm__("faccessat");
 extern int libc_fexecve(int fd, char *const *argv, char *const *envp) noexcept __asm__("fexecve");
 extern int libc_kill(pid_t pid, int sig) noexcept __asm__("kill");
 extern pid_t libc_vfork() noexcept __asm__("vfork");