diff --git a/usr.sbin/bhyve/Makefile b/usr.sbin/bhyve/Makefile
--- a/usr.sbin/bhyve/Makefile
+++ b/usr.sbin/bhyve/Makefile
@@ -111,6 +111,7 @@
 CFLAGS+=-DNO_OPENSSL
 .else
 LIBADD+=	crypto
+CFLAGS+=-DOPENSSL_API_COMPAT=0x10100000L
 .endif
 
 CFLAGS+= -I${BHYVE_SYSDIR}/sys/dev/e1000