Index: libcfa/prelude/defines.hfa.in
===================================================================
--- libcfa/prelude/defines.hfa.in	(revision 4069faade93e68df42b8c7af24253b6a041b469b)
+++ libcfa/prelude/defines.hfa.in	(revision 171ca0ddcab2e5e9c19608a819ac47a1cff1d8cd)
@@ -16,4 +16,7 @@
 #undef HAVE_LINUX_IO_URING_H
 
+#undef HAVE_PREADV2
+#undef HAVE_PWRITEV2
+
 // #define __CFA_IO_POLLING_USER__
 // #define __CFA_IO_POLLING_KERNEL__