diff --git a/x11/libxfce4util/Makefile b/x11/libxfce4util/Makefile
index 7cd41a1c102a..553a3ab73a9c 100644
--- a/x11/libxfce4util/Makefile
+++ b/x11/libxfce4util/Makefile
@@ -12,8 +12,8 @@ COMMENT=	Extension library for the Xfce desktop environment
 
 LICENSE=	GPLv2
 
-USES=		gettext-tools gmake gnome libtool pathfix perl5 pkgconfig \
-		tar:bzip2 xfce
+USES=		compiler:c11 gettext-tools gmake gnome libtool pathfix perl5 \
+		pkgconfig tar:bzip2 xfce
 USE_GNOME=	glib20 intltool
 USE_LDCONFIG=	yes