diff --git a/aider/coders/base_coder.py b/aider/coders/base_coder.py
index 7032e5b8f..497180c3d 100755
--- a/aider/coders/base_coder.py
+++ b/aider/coders/base_coder.py
@@ -328,7 +328,7 @@ class Coder:
         if max_chat_history_tokens is None:
             max_chat_history_tokens = self.main_model.max_chat_history_tokens
         self.summarizer = ChatSummary(
-            self.main_model.weak_model,
+            [self.main_model, self.main_model.weak_model],
             max_chat_history_tokens,
         )