diff --git a/src/ifcexpressparser/bootstrap.py b/src/ifcexpressparser/bootstrap.py
index 53f87d75ac..e20e672943 100644
--- a/src/ifcexpressparser/bootstrap.py
+++ b/src/ifcexpressparser/bootstrap.py
@@ -179,7 +179,6 @@ for id in to_emit:
 print ("""
 # This file is generated by IfcOpenShell ifcexpressparser bootstrap.py
 
-import os
 import os
 import sys
 import pickle