diff --git a/net/openvswitch/Makefile b/net/openvswitch/Makefile
index 22f0e33ae97f..76791ed5d9b6 100644
--- a/net/openvswitch/Makefile
+++ b/net/openvswitch/Makefile
@@ -15,7 +15,8 @@ BROKEN_mips64=		fails to compile: ofp-actions.h:486: flexible array member in ot
 
 BUILD_DEPENDS=	${PYTHON_PKGNAMEPREFIX}six>0:devel/py-six@${PY_FLAVOR}
 
-USES=		cpe gmake libtool perl5 pkgconfig python:2.7 shebangfix ssl
+USES=		compiler:c11 cpe gmake libtool perl5 pkgconfig python:2.7 \
+		shebangfix ssl
 SHEBANG_FILES=	ovn/utilities/ovndb-servers.ocf \
 		utilities/bugtool/ovs-bugtool-ovs-ofctl-loop-over-bridges \
 		utilities/ovs-docker \
diff --git a/net/openvswitch/files/patch-lib_dns-resolve.c b/net/openvswitch/files/patch-lib_dns-resolve.c
new file mode 100644
index 000000000000..ea52505fe871
--- /dev/null
+++ b/net/openvswitch/files/patch-lib_dns-resolve.c
@@ -0,0 +1,10 @@
+--- lib/dns-resolve.c.orig	2019-10-18 14:20:09 UTC
++++ lib/dns-resolve.c
+@@ -22,6 +22,7 @@
+ #include <arpa/nameser.h>
+ #include <errno.h>
+ #include <string.h>
++#include <sys/socket.h>
+ #include <sys/stat.h>
+ #include <unbound.h>
+ #include "hash.h"