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-rw-r--r--tools/notify-dns-slaves.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/tools/notify-dns-slaves.c b/tools/notify-dns-slaves.c
index 83ce910..a21ca1b 100644
--- a/tools/notify-dns-slaves.c
+++ b/tools/notify-dns-slaves.c
@@ -613,6 +613,7 @@ process_notify (const char *zone, const char *server, uint64_t delay)
if (rc == SANY_AF_DNS) {
memset (&hints, 0, sizeof (hints));
hints.ai_family = PF_UNSPEC;
+ hints.ai_protocol = IPPROTO_UDP;
hints.ai_socktype = SOCK_DGRAM;
hints.ai_flags = AI_ADDRCONFIG | AI_NUMERICSERV;
SANY_TYPE (notif->address) = 0;