diff --git a/plugin/mappings.lua b/plugin/mappings.lua
index 5d90e91..ba654dc 100644
--- a/plugin/mappings.lua
+++ b/plugin/mappings.lua
@@ -57,3 +57,9 @@ vim.keymap.set('n', '<leader>gw', function()
   vim.cmd('normal! gggwG')
   vim.fn.winrestview(view)
 end, { desc = 'Format whole file with gw' })
+
+vim.keymap.set('n', '<leader>fm', function()
+  if vim.o.foldexpr == 'nvim_treesitter#foldexpr()' then
+    vim.opt.foldexpr = 'nvim_treesitter#foldexpr()'
+  end
+end)