diff -ruN -x CVS pkgsrc-2017Q2/x11/fltk13/Makefile pkgsrc/x11/fltk13/Makefile
--- pkgsrc-2017Q2/x11/fltk13/Makefile	2016-12-16 01:08:03.000000000 +0100
+++ pkgsrc/x11/fltk13/Makefile	2017-07-28 17:01:19.837082047 +0200
@@ -67,6 +67,8 @@
 .include "../../x11/libXext/buildlink3.mk"
 .include "../../x11/libXft/buildlink3.mk"
 .include "../../x11/libXinerama/buildlink3.mk"
+.include "../../x11/libxcb/buildlink3.mk"
+.include "../../x11/libXcursor/buildlink3.mk"
 BUILDLINK_DEPMETHOD.libXt?=	build
 .include "../../x11/libXt/buildlink3.mk"
 .endif