diff --git a/runtime/lua/man.lua b/runtime/lua/man.lua
index 61950f184e..8f47757c2f 100644
--- a/runtime/lua/man.lua
+++ b/runtime/lua/man.lua
@@ -810,6 +810,8 @@ function M.show_toc()
   fn.setloclist(0, {}, 'a', { title = 'Table of contents' })
   vim.cmd.lopen()
   vim.w.qf_toc = bufname
+  -- reload syntax file after setting qf_toc variable
+  vim.bo.filetype = 'qf'
 end
 
 return M
diff --git a/runtime/lua/vim/treesitter/_headings.lua b/runtime/lua/vim/treesitter/_headings.lua
index bfa468ad88..7cd9dfa4b0 100644
--- a/runtime/lua/vim/treesitter/_headings.lua
+++ b/runtime/lua/vim/treesitter/_headings.lua
@@ -86,6 +86,7 @@ end
 --- Shows an Outline (table of contents) of the current buffer, in the loclist.
 function M.show_toc()
   local bufnr = api.nvim_get_current_buf()
+  local bufname = api.nvim_buf_get_name(bufnr)
   local headings = get_headings(bufnr)
   if #headings == 0 then
     return
@@ -102,6 +103,9 @@ function M.show_toc()
   vim.fn.setloclist(0, headings, ' ')
   vim.fn.setloclist(0, {}, 'a', { title = 'Table of contents' })
   vim.cmd.lopen()
+  vim.w.qf_toc = bufname
+  -- reload syntax file after setting qf_toc variable
+  vim.bo.filetype = 'qf'
 end
 
 --- Jump to section