diff --git a/aider/coders/base_coder.py b/aider/coders/base_coder.py
index 95c408f39..923ebd5b2 100755
--- a/aider/coders/base_coder.py
+++ b/aider/coders/base_coder.py
@@ -72,8 +72,6 @@ class Coder:
     multi_response_content = ""
     partial_response_content = ""
 
-    partial_response_content = None
-
     @classmethod
     def create(
         self,