diff --git a/mail/opendmarc/Makefile b/mail/opendmarc/Makefile
index e7636444a1819..078c9b8d52efd 100644
--- a/mail/opendmarc/Makefile
+++ b/mail/opendmarc/Makefile
@@ -1,6 +1,6 @@
 PORTNAME=	opendmarc
 PORTVERSION=	1.4.2
-PORTREVISION=	2
+PORTREVISION=	3
 CATEGORIES=	mail security
 MASTER_SITES=	GH
 
diff --git a/mail/opendmarc/files/patch-libopendmarc_opendmarc__dns.c b/mail/opendmarc/files/patch-libopendmarc_opendmarc__dns.c
new file mode 100644
index 0000000000000..5d11d7205f973
--- /dev/null
+++ b/mail/opendmarc/files/patch-libopendmarc_opendmarc__dns.c
@@ -0,0 +1,10 @@
+--- libopendmarc/opendmarc_dns.c.orig	2021-12-20 06:40:37 UTC
++++ libopendmarc/opendmarc_dns.c
+@@ -203,6 +203,7 @@ dmarc_dns_get_record(char *domain, int *reply, char *g
+ 		++bp;
+ 
+ #ifdef HAVE_RES_NINIT   
++	memset(&resp, '\0', sizeof resp);
+ 	res_ninit(&resp);
+ #ifdef RES_USE_DNSSEC
+ 	resp.options |= RES_USE_DNSSEC;