diff --git a/buildout/software-profiles/xorg.cfg b/buildout/software-profiles/xorg.cfg
index b3231bd043c838f91de64bb465b5197bd4446d64..415220f6d21b4b2a9a29231540110e8a59deb099 100644
--- a/buildout/software-profiles/xorg.cfg
+++ b/buildout/software-profiles/xorg.cfg
@@ -106,4 +106,5 @@ environment =
   PKG_CONFIG_PATH=${xproto:location}/lib/pkgconfig:${xextproto:location}/lib/pkgconfig:${xtrans:location}/share/pkgconfig:${libxcb:location}/lib/pkgconfig:${xorg-libpthread-stubs:location}/lib/pkgconfig:${libXau:location}/lib/pkgconfig
   LD_LIBRARY_PATH=${xproto:location}/lib:${xextproto:location}/lib:${libxcb:location}/lib
   LD_RUN_PATH=${xproto:location}/lib:${xextproto:location}/lib:${libxcb:location}/lib
-  KEYSYMDEF=${xproto:location}/include/X11/keysymdef.h
+  CFLAGS=-I${xproto:location}/include
+  CPPFLAGS=-I${xproto:location}/include