diff --git a/_Footer.md b/_Footer.md
index 5ee53a8..b3614f7 100644
--- a/_Footer.md
+++ b/_Footer.md
@@ -1,4 +1,6 @@
 ## How can I make sure vim does not open files and other buffers on NerdTree window?
 
+```vim
 " If previous buffer was NERDTree, go back to it.
 autocmd BufEnter * if bufname('#') =~# "^NERD_tree_" | b# | endif
+```
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