--- Makefile	(revision 486250)
+++ Makefile	(working copy)
@@ -12,7 +12,7 @@ 
 
 LICENSE=	MIT
 
-USES=		cmake
+USES=		compiler:c++11-lang cmake
 USE_LDCONFIG=	yes
 CMAKE_ARGS+=	-DBUILD_SHARED_LIBS:BOOL=ON -DYAML_CPP_BUILD_TOOLS=0