diff --git a/configure.ac b/configure.ac
index 9c4571e..e748ff8 100644
--- a/configure.ac
+++ b/configure.ac
@@ -90,7 +90,6 @@ AM_CONDITIONAL(XSERVER_LIBPCIACCESS, test "x$XSERVER_LIBPCIACCESS" = xyes)
 # Checks for libraries.
 
 
-AC_SUBST([XORG_CFLAGS])
 AC_SUBST([moduledir])
 
 DRIVER_NAME=trident