diff --git a/libc/include/glob.h b/libc/include/glob.h
index 2c2b8d1..ccdf2e9 100644
--- a/libc/include/glob.h
+++ b/libc/include/glob.h
@@ -92,8 +92,12 @@
 
 __BEGIN_DECLS
 
+
+#if __BIONIC_AVAILABILITY_GUARD(28)
 int glob(const char* _Nonnull __pattern, int __flags, int (* _Nullable __error_callback)(const char* _Nonnull __failure_path, int __failure_errno), glob_t* _Nonnull __result_ptr) __INTRODUCED_IN(28);
 void globfree(glob_t* _Nonnull __result_ptr) __INTRODUCED_IN(28);
+#endif /* __BIONIC_AVAILABILITY_GUARD(28) */
+
 
 __END_DECLS