Index: head/Mk/Uses/bison.mk
===================================================================
--- head/Mk/Uses/bison.mk	(revision 513604)
+++ head/Mk/Uses/bison.mk	(revision 513605)
@@ -1,31 +1,33 @@
 # $FreeBSD$
 #
 # handle dependency on the bison port
 #
 # Feature:	bison
 # Usage:	USES=bison or USES=bison:ARGS
 # Valid ARGS:	build (default, implicit), run, both
 #
 # MAINTAINER: portmgr@FreeBSD.org
 
 .if !defined(_INCLUDE_USES_BISON_MK)
 _INCLUDE_USES_BISON_MK=	yes
 
 _BISON_DEPENDS=	bison:devel/bison
 
 .if empty(bison_ARGS)
 bison_ARGS=	build
 .endif
 
 .if ${bison_ARGS} == "build"
 BUILD_DEPENDS+=	${_BISON_DEPENDS}
 .elif ${bison_ARGS} == "run"
 RUN_DEPENDS+=	${_BISON_DEPENDS}
 .elif ${bison_ARGS} == "both"
 BUILD_DEPENDS+=	${_BISON_DEPENDS}
 RUN_DEPENDS+=	${_BISON_DEPENDS}
+.elif ${bison_ARGS} == "alias"
+BINARY_ALIAS+=	bison=byacc
 .else
 IGNORE=	USES=bison - invalid args: [${bison_ARGS}] specified
 .endif
 
 .endif