Index: libcfa/prelude/defines.hfa.in
===================================================================
--- libcfa/prelude/defines.hfa.in	(revision fd54fef231baeeb0016103bf19cc8e6d87287faf)
+++ libcfa/prelude/defines.hfa.in	(revision 376946e2a5d4979e762971a1f2899bbe9e7be2e7)
@@ -149,4 +149,8 @@
 
 /* Defined if io_uring support is present when compiling libcfathread and
+   supports the flag BUFFER_SELEC. */
+#undef CFA_HAVE_IOSQE_BUFFER_SELECT
+
+/* Defined if io_uring support is present when compiling libcfathread and
    supports the flag FIXED_FILE. */
 #undef CFA_HAVE_IOSQE_FIXED_FILE