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-rw-r--r--src/src/acl.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/src/acl.c b/src/src/acl.c
index dae310117..5a5abaebf 100644
--- 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;