Index: Makefile
===================================================================
--- Makefile	(revision 492190)
+++ Makefile	(working copy)
@@ -22,7 +22,7 @@
 		p5-Test-Differences>=0.01:devel/p5-Test-Differences \
 		p5-YAML-LibYAML>=0.01:textproc/p5-YAML-LibYAML
 
-USES=		gmake perl5
+USES=		compiler:c++11-lang gmake perl5
 USE_PERL5=	configure
 
 .include <bsd.port.pre.mk>