diff --git a/libc/include/sys/stat.h b/libc/include/sys/stat.h
index ed52bcc..0b4b248 100644
--- a/libc/include/sys/stat.h
+++ b/libc/include/sys/stat.h
@@ -177,7 +177,11 @@
  *
  * Returns 0 on success and returns -1 and sets `errno` on failure.
  */
+
+#if __BIONIC_AVAILABILITY_GUARD(36)
 int lchmod(const char* _Nonnull __path, mode_t __mode) __INTRODUCED_IN(36);
+#endif /* __BIONIC_AVAILABILITY_GUARD(36) */
+
 
 /**
  * [mkdir(2)](https://man7.org/linux/man-pages/man2/mkdir.2.html)
@@ -281,7 +285,11 @@
  *
  * Returns 0 on success and returns -1 and sets `errno` on failure.
  */
+
+#if __BIONIC_AVAILABILITY_GUARD(23)
 int mkfifoat(int __dir_fd, const char* _Nonnull __path, mode_t __mode) __INTRODUCED_IN(23);
+#endif /* __BIONIC_AVAILABILITY_GUARD(23) */
+
 
 /**
  * Used in the tv_nsec field of an argument to utimensat()/futimens()
@@ -332,7 +340,11 @@
  *
  * Available since API level 30.
  */
+
+#if __BIONIC_AVAILABILITY_GUARD(30)
 int statx(int __dir_fd, const char* _Nullable __path, int __flags, unsigned __mask, struct statx* _Nonnull __buf) __INTRODUCED_IN(30);
+#endif /* __BIONIC_AVAILABILITY_GUARD(30) */
+
 #endif
 
 __END_DECLS