diff --git a/expat/files.txt b/expat/files.txt
index 369040dc..5a25fe04 100755
--- a/expat/files.txt
+++ b/expat/files.txt
@@ -16,6 +16,7 @@ xmltok/xmltok.h
 expat.mak
 xmltok/xmltok_impl.c
 xmltok/xmltok_impl.h
+xmltok/xmltok_ns.c
 xmlparse/hashtable.c
 xmlparse/hashtable.h
 xmlparse/xmlparse.c