diff --git a/lua/avante/sidebar.lua b/lua/avante/sidebar.lua
index 0639a74..1fa2ed6 100644
--- a/lua/avante/sidebar.lua
+++ b/lua/avante/sidebar.lua
@@ -584,6 +584,7 @@ local buf_options = {
 }
 
 local base_win_options = {
+  winfixbuf = true,
   spell = false,
   signcolumn = "no",
   foldcolumn = "0",