diff --git a/lua/codecompanion/strategies/inline.lua b/lua/codecompanion/strategies/inline.lua
index fc1b2f5..4b9d62b 100644
--- a/lua/codecompanion/strategies/inline.lua
+++ b/lua/codecompanion/strategies/inline.lua
@@ -364,6 +364,7 @@ function Inline:submit()
 
         if content then
           vim.schedule(function()
+            vim.cmd.undojoin()
             self:append_to_buf(content)
             if self.classification.placement == "new" and api.nvim_get_current_buf() == bufnr then
               ui.buf_scroll_to_end(bufnr)