diff --git a/lua/avante/sidebar.lua b/lua/avante/sidebar.lua
index 452370822..838e3ec61 100644
--- a/lua/avante/sidebar.lua
+++ b/lua/avante/sidebar.lua
@@ -586,7 +586,11 @@ function Sidebar:on_mount()
   api.nvim_create_autocmd("WinResized", {
     group = self.augroup,
     callback = function()
-      if not api.nvim_win_is_valid(self.input_container.winid) or not api.nvim_win_is_valid(self.input.winid) then
+      if
+        not self.input_container.winid
+        or not api.nvim_win_is_valid(self.input_container.winid)
+        or not api.nvim_win_is_valid(self.input.winid)
+      then
         return
       end