--- IO-AIO/AIO.xs	2022/09/26 10:30:53	1.299
+++ IO-AIO/AIO.xs	2022/09/28 08:24:25	1.300
@@ -2917,7 +2917,7 @@
           }
         else
           envp = extract_stringvec (envs, "IO::AIO::fexecve: envs must be an array of strings");
-#if _POSIX_VERSION >= 200809L
+#if HAVE_FEXECVE
           RETVAL = fexecve (fd, argv, envp);
 #else
           RETVAL = (errno = ENOSYS, -1);