diff --git a/net/samba420/Makefile b/net/samba420/Makefile
index 182c270..ec76495 100644
--- a/net/samba420/Makefile
+++ b/net/samba420/Makefile
@@ -1,6 +1,6 @@
 PORTNAME=			${SAMBA4_BASENAME}420
 PORTVERSION=			${SAMBA4_VERSION}
-PORTREVISION=			5
+PORTREVISION=			6
 CATEGORIES?=			net
 MASTER_SITES=			SAMBA/samba/stable SAMBA/samba/rc
 DISTNAME=			${SAMBA4_DISTNAME}
@@ -100,7 +100,8 @@ CONFIGURE_ENV=			PTHREAD_LDFLAGS="-lpthread" \
 MAKE_ENV=			PYTHONHASHSEED=1
 
 USES=				compiler:c++11-lang iconv localbase:ldflags \
-				perl5 pkgconfig shebangfix waf gettext-runtime
+				perl5 pkgconfig shebangfix waf gettext-runtime \
+				bison
 USE_PERL5=			build
 USE_LDCONFIG=			${SAMBA4_LIBDIR}
 WAF_CMD=			buildtools/bin/waf