diff --git a/security/opencryptoki/Makefile b/security/opencryptoki/Makefile
index e829cbf166ed..abfc54b24002 100644
--- a/security/opencryptoki/Makefile
+++ b/security/opencryptoki/Makefile
@@ -1,61 +1,61 @@
 # Created by: Ralf Meister
 
 PORTNAME=	opencryptoki
 PORTVERSION=	3.18.0
 DISTVERSIONPREFIX=	v
 CATEGORIES=	security
 
 MAINTAINER=	hrs@FreeBSD.org
 COMMENT=	Open PKCS\#11 implementation library
 
 LICENSE=	CPL
 LICENSE_NAME=	Common Public License
 LICENSE_FILE=	${WRKSRC}/LICENSE
 LICENSE_PERMS=	dist-mirror dist-sell pkg-mirror pkg-sell auto-accept
 
 LIB_DEPENDS=	libtspi.so:security/trousers \
 		libepoll-shim.so:devel/libepoll-shim
 
-USES=		alias autoreconf gmake libtool localbase ssl tar:tgz
+USES=		alias autoreconf bison gmake libtool localbase ssl tar:tgz
 USE_OPENLDAP=	yes
 USE_LDCONFIG=	${PREFIX}/lib/opencryptoki
 USE_GITHUB=	yes
 GNU_CONFIGURE=	yes
 CONFIGURE_ENV=	LOCALBASE=${LOCALBASE}
 CONFIGURE_ARGS=	--enable-swtok \
 		--enable-tpmtok \
 		--enable-icsftok \
 		--disable-crtok \
 		--disable-aeptok \
 		--disable-ccatok \
 		--disable-bcomtok \
 		--disable-pkcscca_migrate \
 		--with-lockdir=/var/run/opencryptoki \
 		--with-logdir=/var/log/opencryptoki \
 		--localstatedir=/var \
 		--with-openssl=${OPENSSLBASE} \
 		--with-pkcs11user=${USERS} \
 		--with-pkcs11group=${GROUPS} \
 		ac_cv_path_CHGRP=true
 INSTALL_TARGET=	install-strip
 USE_RC_SUBR=	pkcsslotd
 SUB_FILES=	pkg-message
 SUB_LIST=	USERS="${USERS}" GROUPS="${GROUPS}"
 PLIST_SUB=	USERS="${USERS}" GROUPS="${GROUPS}"
 USERS=		_pkcs11
 GROUPS=		_pkcs11
 
 post-patch:
 	cd ${WRKSRC} && \
 	    ${REINPLACE_CMD} 's,%%DLLDIR%%,${PREFIX}/lib/opencryptoki/stdll,' \
 	    usr/sbin/pkcsslotd/opencryptoki.conf
 
 post-install:
 	${MV} ${STAGEDIR}${DOCSDIR}/strength-example.conf \
 	    ${STAGEDIR}${ETCDIR}/strength.conf.sample
 	${MV} ${STAGEDIR}${DOCSDIR}/policy-example.conf \
 	    ${STAGEDIR}${ETCDIR}/policy.conf.sample
 	${RMDIR} ${STAGEDIR}/var/run/opencryptoki/* \
 	    ${STAGEDIR}/var/run/opencryptoki
 
 .include <bsd.port.mk>