diff --git a/pkgs/vim/default.nix b/pkgs/vim/default.nix
index 81f7de2..197fdd5 100755
--- a/pkgs/vim/default.nix
+++ b/pkgs/vim/default.nix
@@ -255,6 +255,9 @@ let
         au BufRead,BufNewFile Vagrantfile set filetype=ruby
       augroup END
 
+      " Neuron things
+      let g:neuron_extension = '.md'
+
       " Extra options
       ${extraOptions}
     '';