diff --git a/lib/libldns/Makefile b/lib/libldns/Makefile
index 5764089e60a1..7714db950f00 100644
--- a/lib/libldns/Makefile
+++ b/lib/libldns/Makefile
@@ -1,29 +1,30 @@
 # $FreeBSD$
 
 # Vendor sources and generated files
 LDNSDIR = ${SRCTOP}/contrib/ldns
 
 PACKAGE=lib${LIB}
 .PATH: ${LDNSDIR} ${LDNSDIR}/compat
 
 LIB=	ldns
 PRIVATELIB= true
 
 CFLAGS+= -I${LDNSDIR}
+CFLAGS+= -DOPENSSL_API_COMPAT=0x10100000L
 
 SRCS=	buffer.c dane.c dname.c dnssec.c dnssec_sign.c dnssec_verify.c \
 	dnssec_zone.c duration.c edns.c error.c higher.c host2str.c \
 	host2wire.c keys.c net.c packet.c parse.c radix.c rbtree.c rdata.c \
 	resolver.c rr.c rr_functions.c sha1.c sha2.c str2host.c tsig.c \
 	update.c util.c wire2host.c zone.c
 
 SRCS+=	b64_ntop.c b64_pton.c
 
 LIBADD=	ssl crypto
 
 WARNS?=	3
 
 CWARNFLAGS.parse.c=	${NO_WUSE_AFTER_FREE}
 CWARNFLAGS.sha2.c=	${NO_WARRAY_PARAMETER}
 
 .include <bsd.lib.mk>