Index: libcfa/configure.ac
===================================================================
--- libcfa/configure.ac	(revision e2702fd7b3981fd9a1de288a52f59a502b874720)
+++ libcfa/configure.ac	(revision 85f19ebf5f3925f6f8cf0da46faa83cd28c69395)
@@ -172,4 +172,5 @@
 AH_TEMPLATE([CFA_HAVE_IOSQE_IO_HARDLINK],[Defined if io_uring support is present when compiling libcfathread and supports the flag IO_HARDLINK.])
 AH_TEMPLATE([CFA_HAVE_SPLICE_F_FD_IN_FIXED],[Defined if io_uring support is present when compiling libcfathread and supports the flag SPLICE_F_FD_IN_FIXED.])
+AH_TEMPLATE([CFA_HAVE_IORING_SETUP_ATTACH_WQ],[Defined if io_uring support is present when compiling libcfathread and supports the flag IORING_SETUP_ATTACH_WQ.])
 AH_TEMPLATE([HAVE_PREADV2],[Defined if preadv2 support is present when compiling libcfathread.])
 AH_TEMPLATE([HAVE_PWRITEV2],[Defined if pwritev2 support is present when compiling libcfathread.])
@@ -177,5 +178,5 @@
 
 define(ioring_ops, [IORING_OP_NOP,IORING_OP_READV,IORING_OP_WRITEV,IORING_OP_FSYNC,IORING_OP_READ_FIXED,IORING_OP_WRITE_FIXED,IORING_OP_POLL_ADD,IORING_OP_POLL_REMOVE,IORING_OP_SYNC_FILE_RANGE,IORING_OP_SENDMSG,IORING_OP_RECVMSG,IORING_OP_TIMEOUT,IORING_OP_TIMEOUT_REMOVE,IORING_OP_ACCEPT,IORING_OP_ASYNC_CANCEL,IORING_OP_LINK_TIMEOUT,IORING_OP_CONNECT,IORING_OP_FALLOCATE,IORING_OP_OPENAT,IORING_OP_CLOSE,IORING_OP_FILES_UPDATE,IORING_OP_STATX,IORING_OP_READ,IORING_OP_WRITE,IORING_OP_FADVISE,IORING_OP_MADVISE,IORING_OP_SEND,IORING_OP_RECV,IORING_OP_OPENAT2,IORING_OP_EPOLL_CTL,IORING_OP_SPLICE,IORING_OP_PROVIDE_BUFFERS,IORING_OP_REMOVE_BUFFER])
-define(ioring_flags, [IOSQE_FIXED_FILE,IOSQE_IO_DRAIN,IOSQE_ASYNC,IOSQE_IO_LINK,IOSQE_IO_HARDLINK,SPLICE_F_FD_IN_FIXED])
+define(ioring_flags, [IOSQE_FIXED_FILE,IOSQE_IO_DRAIN,IOSQE_ASYNC,IOSQE_IO_LINK,IOSQE_IO_HARDLINK,SPLICE_F_FD_IN_FIXED,IORING_SETUP_ATTACH_WQ])
 
 define(ioring_from_decls, [
Index: libcfa/prelude/defines.hfa.in
===================================================================
--- libcfa/prelude/defines.hfa.in	(revision e2702fd7b3981fd9a1de288a52f59a502b874720)
+++ libcfa/prelude/defines.hfa.in	(revision 85f19ebf5f3925f6f8cf0da46faa83cd28c69395)
@@ -137,4 +137,8 @@
 
 /* Defined if io_uring support is present when compiling libcfathread and
+   supports the flag IORING_SETUP_ATTACH_WQ. */
+#undef CFA_HAVE_IORING_SETUP_ATTACH_WQ
+
+/* Defined if io_uring support is present when compiling libcfathread and
    supports the flag ASYNC. */
 #undef CFA_HAVE_IOSQE_ASYNC