diff --git a/qse/configure b/qse/configure
index 4c50bb1e..6e3cb9af 100755
--- a/qse/configure
+++ b/qse/configure
@@ -18508,7 +18508,7 @@ fi
 
 done
 
-for ac_header in sys/sendfile.h sys/epoll.h sys/event.h
+for ac_header in sys/sendfile.h sys/epoll.h sys/event.h sys/poll.h
 do :
   as_ac_Header=`$as_echo "ac_cv_header_$ac_header" | $as_tr_sh`
 ac_fn_c_check_header_mongrel "$LINENO" "$ac_header" "$as_ac_Header" "$ac_includes_default"
diff --git a/qse/configure.ac b/qse/configure.ac
index 62518aa5..c269f467 100644
--- a/qse/configure.ac
+++ b/qse/configure.ac
@@ -123,7 +123,7 @@ AC_HEADER_STDC
 AC_CHECK_HEADERS([stddef.h wchar.h wctype.h errno.h signal.h fcntl.h dirent.h])
 AC_CHECK_HEADERS([time.h sys/time.h utime.h spawn.h execinfo.h ucontext.h])
 AC_CHECK_HEADERS([sys/resource.h sys/wait.h sys/syscall.h sys/ioctl.h])
-AC_CHECK_HEADERS([sys/sendfile.h sys/epoll.h sys/event.h])
+AC_CHECK_HEADERS([sys/sendfile.h sys/epoll.h sys/event.h sys/poll.h])
 AC_CHECK_HEADERS([sys/sysctl.h sys/socket.h sys/sockio.h sys/un.h])
 AC_CHECK_HEADERS([ifaddrs.h tiuser.h linux/netfilter_ipv4.h netinet/sctp.h netpacket/packet.h])
 AC_CHECK_HEADERS([net/if.h net/if_dl.h], [], [], [
diff --git a/qse/include/qse/config.h.in b/qse/include/qse/config.h.in
index 465a1229..7f366bcf 100644
--- a/qse/include/qse/config.h.in
+++ b/qse/include/qse/config.h.in
@@ -646,6 +646,9 @@
    */
 #undef HAVE_SYS_NDIR_H
 
+/* Define to 1 if you have the <sys/poll.h> header file. */
+#undef HAVE_SYS_POLL_H
+
 /* Define to 1 if you have the <sys/prctl.h> header file. */
 #undef HAVE_SYS_PRCTL_H