diff --git a/etc/nxml/03400-04DBF.el b/etc/nxml/03400-04DBF.el
new file mode 100644
index 00000000000..45d69119e80
--- /dev/null
+++ b/etc/nxml/03400-04DBF.el
@@ -0,0 +1,4 @@
+(nxml-define-char-name-set 'cjk-unified-ideographs-extension-a
+  '())
+
+;; arch-tag: 571a41a5-7cc5-47c4-b98c-e98a415723bb