diff --git a/utils/lit/lit/run.py b/utils/lit/lit/run.py
index 15e81447782..4d16399fec4 100644
--- a/utils/lit/lit/run.py
+++ b/utils/lit/lit/run.py
@@ -1,5 +1,6 @@
 import multiprocessing
 import time
+import os
 
 import lit.Test
 import lit.util