diff --git a/runtime/ftplugin/lua.vim b/runtime/ftplugin/lua.vim
index c6ce4a0..88b1fc9 100644
--- a/runtime/ftplugin/lua.vim
+++ b/runtime/ftplugin/lua.vim
@@ -4,7 +4,7 @@
 " Previous Maintainer:	Max Ischenko <mfi@ukr.net>
 " Contributor:		Dorai Sitaram <ds26@gte.com>
 "			C.D. MacEachern <craig.daniel.maceachern@gmail.com>
-" Last Change:		2022 Nov 16
+" Last Change:		2022 Nov 19
 
 if exists("b:did_ftplugin")
   finish
@@ -21,7 +21,7 @@
 let &l:define = '\<function\|\<local\%(\s\+function\)\='
 
 " TODO: handle init.lua
-setlocal includeexpr=substitute(v:fname,'\.','/','g')
+setlocal includeexpr=tr(v:fname,'.','/')
 setlocal suffixesadd=.lua
 
 let b:undo_ftplugin = "setlocal cms< com< def< fo< inex< sua<"