diff --git a/x11-packages/xorg-server-xvfb/configure.patch b/x11-packages/xorg-server-xvfb/configure.patch
new file mode 100644
index 000000000..184a1f15f
--- /dev/null
+++ b/x11-packages/xorg-server-xvfb/configure.patch
@@ -0,0 +1,20 @@
+diff -uNr xorg-server-1.20.10/configure xorg-server-1.20.10.mod/configure
+--- xorg-server-1.20.10/configure	2020-12-01 16:32:41.000000000 +0000
++++ xorg-server-1.20.10.mod/configure	2020-12-08 20:24:46.708451366 +0000
+@@ -21814,6 +21814,7 @@
+ # Check for flag to avoid builtin definitions - assumes unix is predefined,
+ # which is not the best choice for supporting other OS'es, but covers most
+ # of the ones we need for now.
++if false; then
+ { $as_echo "$as_me:${as_lineno-$LINENO}: checking if $RAWCPP requires -undef" >&5
+ $as_echo_n "checking if $RAWCPP requires -undef... " >&6; }
+ cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+@@ -21859,7 +21860,7 @@
+ 	fi
+ fi
+ rm -f conftest.$ac_ext
+-
++fi
+ 
+ 
+