diff --git a/aider/mdstream.py b/aider/mdstream.py
index 0611a806d..186ef7624 100755
--- a/aider/mdstream.py
+++ b/aider/mdstream.py
@@ -1,7 +1,6 @@
 #!/usr/bin/env python
 
 import io
-import threading
 import time
 
 from rich import box