diff --git a/aider/coder.py b/aider/coder.py
index 0f5e35953..29a6440be 100755
--- a/aider/coder.py
+++ b/aider/coder.py
@@ -33,6 +33,9 @@ class Coder:
 
         self.io = io
 
+        self.cur_messages = []
+        self.done_messages = []
+
         self.auto_commits = auto_commits
         self.dry_run = dry_run