diff --git a/vimrc b/vimrc
index efeb933..47a1536 100644
--- a/vimrc
+++ b/vimrc
@@ -101,6 +101,8 @@ Plug 'MarcWeber/vim-addon-nix'
 
 Plug 'urbit/hoon.vim'
 
+Plug 'ahf/twelf-syntax'
+
 call plug#end()
 
 filetype plugin indent on