diff --git a/devel/flexdock/Makefile b/devel/flexdock/Makefile
index b879cf14a6d7..e812c65b947f 100644
--- a/devel/flexdock/Makefile
+++ b/devel/flexdock/Makefile
@@ -1,31 +1,32 @@
 PORTNAME=	flexdock
 PORTVERSION=	1.2.4
 PORTREVISION=	1
 CATEGORIES=	devel java
 MASTER_SITES=	http://forge.scilab.org/index.php/p/${PORTNAME}/downloads/get/
 
 MAINTAINER=	ports@FreeBSD.org
 COMMENT=	Swing windowing and docking framework
 WWW=		https://forge.scilab.org/index.php/p/flexdock/
 
 LICENSE=	MIT
 LICENSE_FILE=	${WRKSRC}/LICENSE.txt
 
 USES=		java:ant,run
+JAVA_VERSION=  8 # math/scilab needs java 8 compatible classes
 
 ALL_TARGET=	dist
 NO_ARCH=	yes
 
 PLIST_FILES=	${JAVAJARDIR}/flexdock.jar
 PORTDOCS=	*
 
 OPTIONS_DEFINE=	DOCS
 
 do-install:
 	${INSTALL_DATA}	${WRKSRC}/build/${PORTNAME}-${PORTVERSION}.jar ${STAGEDIR}${JAVAJARDIR}/${PORTNAME}.jar
 
 do-install-DOCS-on:
 	${MKDIR} ${STAGEDIR}${DOCSDIR}
 	(cd ${WRKSRC}/build/docs && ${COPYTREE_SHARE} \* ${STAGEDIR}${DOCSDIR})
 
 .include <bsd.port.mk>
diff --git a/java/jgraphx/Makefile b/java/jgraphx/Makefile
index b5e67f4e439d..6f36d5e1f812 100644
--- a/java/jgraphx/Makefile
+++ b/java/jgraphx/Makefile
@@ -1,33 +1,34 @@
 PORTNAME=	jgraphx
 PORTVERSION=	4.2.2
 PORTREVISION=	1
 DISTVERSIONPREFIX=	v
 CATEGORIES=	java graphics
 
 MAINTAINER=	ports@FreeBSD.org
 COMMENT=	Java Graph Diagram Component version X
 WWW=		https://github.com/jgraph/jgraphx
 
 LICENSE=	BSD3CLAUSE
 LICENSE_FILE=	${WRKSRC}/license.txt
 
 USES=		java:ant,run
 USE_GITHUB=	yes
 GH_ACCOUNT=	jgraph
+JAVA_VERSION=  8 # math/scilab needs java 8 compatible classes
 
 NO_ARCH=	yes
 
 PLIST_FILES=	${JAVAJARDIR}/${PORTNAME}.jar
 PORTDOCS=	*
 
 OPTIONS_DEFINE=	DOCS
 
 do-install:
 	${INSTALL_DATA} ${WRKSRC}/lib/${PORTNAME}.jar \
 		${STAGEDIR}${JAVAJARDIR}/${PORTNAME}.jar
 
 do-install-DOCS-on:
 	${MKDIR} ${STAGEDIR}${DOCSDIR}
 	cd ${WRKSRC}/docs && ${COPYTREE_SHARE} \* ${STAGEDIR}${DOCSDIR}
 
 .include <bsd.port.mk>