diff --git a/aider/coders/base_coder.py b/aider/coders/base_coder.py
index b5302122a..49c035eda 100755
--- a/aider/coders/base_coder.py
+++ b/aider/coders/base_coder.py
@@ -193,6 +193,7 @@ class Coder:
         aider_ignore_file=None,
         cur_messages=None,
         done_messages=None,
+        max_chat_history_tokens=None,
     ):
         if not fnames:
             fnames = []
diff --git a/aider/main.py b/aider/main.py
index 1bba9cdd0..ef45b7fc0 100644
--- a/aider/main.py
+++ b/aider/main.py
@@ -334,6 +334,7 @@ def main(argv=None, input=None, output=None, force_git_root=None, return_coder=F
             use_git=args.git,
             voice_language=args.voice_language,
             aider_ignore_file=args.aiderignore,
+            max_chat_history_tokens=args.max_chat_history_tokens,
         )
 
     except ValueError as err: