diff --git a/libc/include/fcntl.h b/libc/include/fcntl.h
index 1e9a285..2bd1fc6 100644
--- a/libc/include/fcntl.h
+++ b/libc/include/fcntl.h
@@ -227,7 +227,11 @@
  *
  * Returns 0 on success and returns -1 and sets `errno` on failure.
  */
+
+#if __BIONIC_AVAILABILITY_GUARD(26)
 int sync_file_range(int __fd, off64_t __offset, off64_t __length, unsigned int __flags) __INTRODUCED_IN(26);
+#endif /* __BIONIC_AVAILABILITY_GUARD(26) */
+
 
 #endif