$OpenBSD: patch-setupext_py,v 1.14 2014/01/10 19:05:07 landry Exp $
--- setupext.py.orig	Fri Jan 10 19:53:17 2014
+++ setupext.py	Fri Jan 10 19:56:08 2014
@@ -1167,6 +1167,7 @@ def build_tkagg(ext_modules, packages):
                        define_macros=defines
                        )
 
+    module.include_dirs.extend(['${X11BASE}/include'])
     add_tk_flags(module) # do this first
     add_agg_flags(module)
     add_ft2font_flags(module)
