Index: libcfa/prelude/defines.hfa.in
===================================================================
--- libcfa/prelude/defines.hfa.in	(revision cf5af9c8d29577a706fa60398a64924729dc5c24)
+++ libcfa/prelude/defines.hfa.in	(revision 1d179399a54c3ddcecf129adeec6303b1492ddac)
@@ -14,5 +14,39 @@
 //
 
-#undef HAVE_LINUX_IO_URING_H
+#undef CFA_HAVE_LINUX_IO_URING_H
+
+#undef CFA_HAVE_IORING_OP_NOP
+#undef CFA_HAVE_IORING_OP_READV
+#undef CFA_HAVE_IORING_OP_WRITEV
+#undef CFA_HAVE_IORING_OP_FSYNC
+#undef CFA_HAVE_IORING_OP_READ_FIXED
+#undef CFA_HAVE_IORING_OP_WRITE_FIXED
+#undef CFA_HAVE_IORING_OP_POLL_ADD
+#undef CFA_HAVE_IORING_OP_POLL_REMOVE
+#undef CFA_HAVE_IORING_OP_SYNC_FILE_RANGE
+#undef CFA_HAVE_IORING_OP_SENDMSG
+#undef CFA_HAVE_IORING_OP_RECVMSG
+#undef CFA_HAVE_IORING_OP_TIMEOUT
+#undef CFA_HAVE_IORING_OP_TIMEOUT_REMOVE
+#undef CFA_HAVE_IORING_OP_ACCEPT
+#undef CFA_HAVE_IORING_OP_ASYNC_CANCEL
+#undef CFA_HAVE_IORING_OP_LINK_TIMEOUT
+#undef CFA_HAVE_IORING_OP_CONNECT
+#undef CFA_HAVE_IORING_OP_FALLOCATE
+#undef CFA_HAVE_IORING_OP_OPENAT
+#undef CFA_HAVE_IORING_OP_CLOSE
+#undef CFA_HAVE_IORING_OP_FILES_UPDATE
+#undef CFA_HAVE_IORING_OP_STATX
+#undef CFA_HAVE_IORING_OP_READ
+#undef CFA_HAVE_IORING_OP_WRITE
+#undef CFA_HAVE_IORING_OP_FADVISE
+#undef CFA_HAVE_IORING_OP_MADVISE
+#undef CFA_HAVE_IORING_OP_SEND
+#undef CFA_HAVE_IORING_OP_RECV
+#undef CFA_HAVE_IORING_OP_OPENAT2
+#undef CFA_HAVE_IORING_OP_EPOLL_CTL
+#undef CFA_HAVE_IORING_OP_SPLICE
+#undef CFA_HAVE_IORING_OP_PROVIDE_BUFFERS
+#undef CFA_HAVE_IORING_OP_REMOVE_BUFFER
 
 #undef HAVE_PREADV2