diff --git a/.vim/after/ftplugin/openscad.vim b/.vim/after/ftplugin/openscad.vim
index 3191b65..6b79341 100644
--- a/.vim/after/ftplugin/openscad.vim
+++ b/.vim/after/ftplugin/openscad.vim
@@ -2,3 +2,4 @@ setlocal tabstop=2
 setlocal softtabstop=2
 setlocal shiftwidth=2
 setlocal expandtab
+setlocal commentstring=//\ %s