diff --git a/x11-clocks/xfce4-stopwatch-plugin/Makefile b/x11-clocks/xfce4-stopwatch-plugin/Makefile
index 372c8a2a83c9..c9f1de7ce62d 100644
--- a/x11-clocks/xfce4-stopwatch-plugin/Makefile
+++ b/x11-clocks/xfce4-stopwatch-plugin/Makefile
@@ -12,7 +12,8 @@ COMMENT=	XFCE panel plugin to keep track of elapsed time
 LICENSE=	BSD2CLAUSE
 LICENSE_FILE=	${WRKSRC}/COPYING
 
-USES=		gettext-tools gmake gnome libtool pkgconfig tar:bzip2 xfce
+USES=		compiler:c11 gettext-tools gmake gnome libtool pkgconfig \
+		tar:bzip2 xfce
 USE_GNOME=	cairo gtk30 intltool
 USE_XFCE=	panel