diff --git a/aider/coders/base_coder.py b/aider/coders/base_coder.py
index 76a3b610c..3b033f45c 100755
--- a/aider/coders/base_coder.py
+++ b/aider/coders/base_coder.py
@@ -346,7 +346,7 @@ class Coder:
         ]
 
         main_sys = self.gpt_prompts.main_system
-        if self.main_model.use_repo_map:
+        if self.main_model.max_context_tokens > 4*1024:
             main_sys += "\n" + self.gpt_prompts.system_reminder
 
         messages = [