diff --git a/mitogen/doas.py b/mitogen/doas.py
index 3a6f881d..0f6a106c 100644
--- a/mitogen/doas.py
+++ b/mitogen/doas.py
@@ -27,7 +27,6 @@
 # POSSIBILITY OF SUCH DAMAGE.
 
 import logging
-import os
 
 import mitogen.core
 import mitogen.parent