diff --git a/lua/avante/providers/openai.lua b/lua/avante/providers/openai.lua
index b1fe398..8d64803 100644
--- a/lua/avante/providers/openai.lua
+++ b/lua/avante/providers/openai.lua
@@ -203,6 +203,10 @@ function M:parse_messages(opts)
       else
         table.insert(final_messages, { role = self.role_map["assistant"], content = "Ok, I understand." })
       end
+    else
+      if role == "user" and prev_role == "tool" and M.is_mistral(provider_conf.endpoint) then
+        table.insert(final_messages, { role = self.role_map["assistant"], content = "Ok, I understand." })
+      end
     end
     prev_role = role
     table.insert(final_messages, message)