--- Mk/bsd.options.mk	(revision 395021)
+++ Mk/bsd.options.mk	(working copy)
@@ -134,7 +134,7 @@ OPTIONSMKINCLUDED=	bsd.options.mk
 OPTIONS_NAME?=	${PKGORIGIN:S/\//_/}
 OPTIONS_FILE?=	${PORT_DBDIR}/${OPTIONS_NAME}/options
 
-_OPTIONS_FLAGS=	ALL_TARGET BROKEN CATEGORIES CFLAGS CONFIGURE_ENV CONFLICTS \
+_OPTIONS_FLAGS+=ALL_TARGET BROKEN CATEGORIES CFLAGS CONFIGURE_ENV CONFLICTS \
 		CONFLICTS_BUILD CONFLICTS_INSTALL CPPFLAGS CXXFLAGS DISTFILES \
 		EXTRA_PATCHES EXTRACT_ONLY GH_ACCOUNT GH_PROJECT GH_TAGNAME \
 		IGNORE INFO INSTALL_TARGET LDFLAGS LIBS MAKE_ARGS MAKE_ENV \