diff --git a/cad/tochnog/Makefile b/cad/tochnog/Makefile
index 916c006658412..9c968416088f0 100644
--- a/cad/tochnog/Makefile
+++ b/cad/tochnog/Makefile
@@ -46,6 +46,10 @@ ALL_TARGET=	freebsd_old
 LIB_DEPENDS+=	libsuperlu.so:math/superlu
 SUPERLU=	superlu
 
+.if ${OPSYS} == FreeBSD && ( ${OSVERSION} >= 1400091 || ( ${OSVERSION} >= 1302507 && ${OSVERSION} < 1400000 ))
+CPPFLAGS+=  -Dregister=
+.endif
+
 post-extract:
 .for sup in gid tools test
 	${MV} ${WRKDIR}/${sup} ${WRKDIR}/Sources/