diff --git a/nvim/plugin/editing.vim b/nvim/plugin/editing.vim
index 94cc5cf..5d796fa 100644
--- a/nvim/plugin/editing.vim
+++ b/nvim/plugin/editing.vim
@@ -273,6 +273,7 @@ set commentstring=//%s
   omap <silent> gc ac
 
   let g:tcomment#ignore_comment_def = ['asm']
+  let g:tcomment#commentstring_c = '// %s'
 
 " }}}