Tighter guard for POLLRDHUP

diff --git a/src/src/acl.c b/src/src/acl.c
index dae31011784ce69379907b0b5356e6962f1f7826..5a5abaebf1ba59e47079f0e61acee11f0388dcd4 100644 (file)
--- a/src/src/acl.c
+++ b/src/src/acl.c
@@ -3494,7 +3494,7 @@ for (; cb != NULL; cb = cb->next)
           if (smtp_out != NULL && !disable_delay_flush)
            mac_smtp_fflush();
 
-#if !defined(NO_POLL_H) && defined (_GNU_SOURCE)
+#if !defined(NO_POLL_H) && defined (POLLRDHUP)
            {
            struct pollfd p;
            nfds_t n = 0;