diff --git a/textproc/castxml/Makefile b/textproc/castxml/Makefile
index b3f2575f7a14..f895f6e89d44 100644
--- a/textproc/castxml/Makefile
+++ b/textproc/castxml/Makefile
@@ -14,7 +14,7 @@ BUILD_DEPENDS=	clang${LLVM_VERSION}:devel/llvm${LLVM_VERSION}
 RUN_DEPENDS=	clang${LLVM_VERSION}:devel/llvm${LLVM_VERSION}
 TEST_DEPENDS=	${LOCALBASE}/lib/libxml2.so:textproc/libxml2
 
-USES=		cmake
+USES=		cmake compiler:c++11-lang
 USE_GITHUB=	yes
 GH_ACCOUNT=	CastXML
 GH_PROJECT=	CastXML