diff -urN pgbouncer.orig/Makefile pgbouncer/Makefile
--- pgbouncer.orig/Makefile	2017-03-15 17:45:30.000000000 +0300
+++ pgbouncer/Makefile	2017-04-09 05:07:17.264064000 +0300
@@ -3,7 +3,7 @@
 
 PORTNAME=	pgbouncer
 PORTVERSION=	1.7.2
-PORTREVISION=	2
+PORTREVISION=	3
 CATEGORIES=	databases
 MASTER_SITES=	https://pgbouncer.github.io/downloads/files/${PORTVERSION}/ \
 		http://pgbouncer.github.io/downloads/files/${PORTVERSION}/
@@ -26,6 +26,11 @@
 GNU_CONFIGURE=	yes
 USES=		gmake ssl
 
+OPTIONS_DEFINE=	C-ARES
+C-ARES_DESC=	Use c-ares as Asynchronous DNS resolver
+C-ARES_LIB_DEPENDS=	libcares.so:dns/c-ares
+C-ARES_CONFIGURE_WITHOUT=	cares
+
 CONFIGURE_ARGS=	--with-libevent=${LOCALBASE} --enable-evdns
 CONFIGURE_ENV+=	PTHREAD_LIBS="-lpthread"