diff --git a/msg/tools/px_generate_uorb_topic_helper.py b/msg/tools/px_generate_uorb_topic_helper.py
index b13a53195a..739d7dc8e2 100644
--- a/msg/tools/px_generate_uorb_topic_helper.py
+++ b/msg/tools/px_generate_uorb_topic_helper.py
@@ -6,6 +6,7 @@
 
 import os
 import yaml
+import errno
 
 import genmsg.msgs
 import gencpp