diff --git a/plugin/holtrop.lua b/plugin/holtrop.lua
index 7c7f392..c6613f7 100644
--- a/plugin/holtrop.lua
+++ b/plugin/holtrop.lua
@@ -42,3 +42,5 @@ vim.api.nvim_create_autocmd({ "FocusGained", "BufEnter" }, {
     end
   end,
 })
+
+vim.filetype.add({filename = {["Rsconscript"] = "ruby"}})