diff --git a/accessibility/gammy/Makefile b/accessibility/gammy/Makefile
index 8dfedd3050d3..06b5094f3fcb 100644
--- a/accessibility/gammy/Makefile
+++ b/accessibility/gammy/Makefile
@@ -10,7 +10,7 @@ COMMENT=	Adaptive screen brightness and temperature for Windows and Unix
 
 LICENSE=	GPLv3
 
-USES=		gl qmake qt:5 xorg
+USES=		compiler:c++11-lang gl qmake qt:5 xorg
 USE_QT=		core dbus gui widgets \
 		buildtools_build qmake_build
 USE_GL=		gl