Index: Makefile
===================================================================
--- Makefile	(revision 498040)
+++ Makefile	(working copy)
@@ -12,7 +12,7 @@
 LICENSE=	GPLv3
 LICENSE_FILE=	${WRKSRC}/COPYING
 
-USES=		qmake qt:5
+USES=		compiler:c++11-lang qmake qt:5
 USE_QT=		buildtools_build core gui linguisttools_build multimedia network \
 		printsupport sql sql-sqlite3_run widgets
 DESKTOP_ENTRIES=	"KLog" "Simple Amateur Radio Logging Program" \