diff --git a/aider/coders/wholefile_prompts.py b/aider/coders/wholefile_prompts.py
index 08bf17313..605cc7de3 100644
--- a/aider/coders/wholefile_prompts.py
+++ b/aider/coders/wholefile_prompts.py
@@ -30,7 +30,7 @@ show_greeting.py
 import sys
 
 def greeting(name):
-    print(f"Hey {name}")
+    print(f"Hey {{name}}")
 
 if __name__ == '__main__':
     greeting(sys.argv[1])