--- Makefile	(revision 483399)
+++ Makefile	(working copy)
@@ -14,7 +14,7 @@ 
 
 SUB_FILES+=	pkg-install
 
-USES=		dos2unix gmake python qmake qt:5 tar:bzip2
+USES=		compiler:c++11-lang dos2unix gmake python qmake qt:5 tar:bzip2
 USE_QT=		buildtools concurrent core dbus gui imageformats network printsupport qmake serialport sql-sqlite3 svg xml
 DOS2UNIX_REGEX=	.*pro
 INSTALLS_ICONS=	yes