diff --git a/sbin/decryptcore/Makefile b/sbin/decryptcore/Makefile
index 3a3a6a029f87..afaa0311ae50 100644
--- a/sbin/decryptcore/Makefile
+++ b/sbin/decryptcore/Makefile
@@ -1,11 +1,12 @@
 # $FreeBSD$
 
 PROG=	decryptcore
 
+CFLAGS+=-DOPENSSL_API_COMPAT=0x10100000L
 LIBADD=	crypto pjdlog
 
 MAN=	decryptcore.8
 
 CFLAGS+=-I${SRCTOP}/lib/libpjdlog
 
 .include <bsd.prog.mk>