diff --git a/aider/models.py b/aider/models.py
index 4329886d7..3201ac0b6 100644
--- a/aider/models.py
+++ b/aider/models.py
@@ -5,6 +5,7 @@ import json
 import math
 import os
 import platform
+import re
 import sys
 import time
 from dataclasses import dataclass, fields