Index: Makefile
===================================================================
--- Makefile	(revision 483399)
+++ Makefile	(working copy)
@@ -15,7 +15,7 @@
 
 BROKEN_powerpc=	does not compile; unrecognized C++ options
 
-USES=		cpe gmake zip
+USES=		cpe compiler:c++11-lang gmake zip
 USE_LDCONFIG=	yes
 CPE_PRODUCT=	crypto++
 CPE_VENDOR=	cryptopp