diff --git a/runtime/ftplugin/lua.lua b/runtime/ftplugin/lua.lua
index ef8f126fab..7c54b2cb1e 100644
--- a/runtime/ftplugin/lua.lua
+++ b/runtime/ftplugin/lua.lua
@@ -1,7 +1,7 @@
 -- use treesitter over syntax
 vim.treesitter.start()
 
-vim.bo.includeexpr = 'v:lua.require"vim._ftplugin.lua".includeexpr()'
+vim.bo.includeexpr = [[v:lua.require'vim._ftplugin.lua'.includeexpr(v:fname)]]
 vim.bo.omnifunc = 'v:lua.vim.lua_omnifunc'
 vim.wo[0][0].foldexpr = 'v:lua.vim.treesitter.foldexpr()'