diff --git a/configure.ac b/configure.ac
index 37f7888..f4a3ec0 100644
--- a/configure.ac
+++ b/configure.ac
@@ -121,7 +121,6 @@ fi
 AM_CONDITIONAL(XSERVER_LIBPCIACCESS, test "x$XSERVER_LIBPCIACCESS" = xyes)
 
 AC_SUBST([DRI_CFLAGS])
-AC_SUBST([XORG_CFLAGS])
 AC_SUBST([moduledir])
 
 DRIVER_NAME=sis