diff --git a/moo/configure b/moo/configure
index e2dfb02..3014b96 100755
--- a/moo/configure
+++ b/moo/configure
@@ -18384,12 +18384,13 @@ _ACEOF
 fi
 done
 
-for ac_func in accept4
+for ac_func in accept4 pipe2 epoll_create1
 do :
-  ac_fn_c_check_func "$LINENO" "accept4" "ac_cv_func_accept4"
-if test "x$ac_cv_func_accept4" = xyes; then :
+  as_ac_var=`$as_echo "ac_cv_func_$ac_func" | $as_tr_sh`
+ac_fn_c_check_func "$LINENO" "$ac_func" "$as_ac_var"
+if eval test \"x\$"$as_ac_var"\" = x"yes"; then :
   cat >>confdefs.h <<_ACEOF
-#define HAVE_ACCEPT4 1
+#define `$as_echo "HAVE_$ac_func" | $as_tr_cpp` 1
 _ACEOF
 
 fi
diff --git a/moo/configure.ac b/moo/configure.ac
index 9d6a203..ea5be41 100644
--- a/moo/configure.ac
+++ b/moo/configure.ac
@@ -154,7 +154,7 @@ AC_CHECK_FUNCS([makecontext swapcontext getcontext setcontext])
 AC_CHECK_FUNCS([clock_nanosleep nanosleep usleep])
 AC_CHECK_FUNCS([localtime_r gmtime_r])
 AC_CHECK_FUNCS([snprintf _vsnprintf _vsnwprintf strerror_r])
-AC_CHECK_FUNCS([accept4])
+AC_CHECK_FUNCS([accept4 pipe2 epoll_create1])
 AC_CHECK_FUNCS([isatty mmap munmap])
 
 save_LIBS="$LIBS"
diff --git a/moo/lib/moo-cfg.h.in b/moo/lib/moo-cfg.h.in
index f5c8bb1..8141ec4 100644
--- a/moo/lib/moo-cfg.h.in
+++ b/moo/lib/moo-cfg.h.in
@@ -60,6 +60,9 @@
 /* dyncall library is available */
 #undef HAVE_DYNCALL_LIB
 
+/* Define to 1 if you have the `epoll_create1' function. */
+#undef HAVE_EPOLL_CREATE1
+
 /* Define to 1 if you have the <errno.h> header file. */
 #undef HAVE_ERRNO_H
 
@@ -141,6 +144,9 @@
 /* Define to 1 if you have the <net/if_dl.h> header file. */
 #undef HAVE_NET_IF_DL_H
 
+/* Define to 1 if you have the `pipe2' function. */
+#undef HAVE_PIPE2
+
 /* Define to 1 if you have the <poll.h> header file. */
 #undef HAVE_POLL_H