diff --git a/aider/commands.py b/aider/commands.py
index 4d67ba92e..f48873049 100644
--- a/aider/commands.py
+++ b/aider/commands.py
@@ -81,7 +81,7 @@ class Commands:
         "Switch to a new LLM"
 
         model_name = args.strip()
-        model = models.Model(model_name)
+        model = models.Model(model_name, weak_model=self.coder.main_model.weak_model.name)
         models.sanity_check_models(self.io, model)
         raise SwitchCoder(main_model=model)