diff --git a/lua/oil/util.lua b/lua/oil/util.lua
index ac04328..37e73cc 100644
--- a/lua/oil/util.lua
+++ b/lua/oil/util.lua
@@ -582,6 +582,7 @@ M.render_text = function(bufnr, text, opts)
     h_align = "center",
     v_align = "center",
   })
+  ---@cast opts -nil
   if not vim.api.nvim_buf_is_valid(bufnr) then
     return
   end
diff --git a/lua/oil/view.lua b/lua/oil/view.lua
index 136c798..a25917b 100644
--- a/lua/oil/view.lua
+++ b/lua/oil/view.lua
@@ -909,8 +909,9 @@ local pending_renders = {}
 ---@param bufnr integer
 ---@param opts nil|table
 ---    refetch nil|boolean Defaults to true
----@param callback nil|fun(err: nil|string)
+---@param caller_callback nil|fun(err: nil|string)
 M.render_buffer_async = function(bufnr, opts, caller_callback)
+  opts = opts or {}
   local function callback(err)
     if not err then
       vim.api.nvim_exec_autocmds(