diff --git a/j1939/electronic_control_unit.py b/j1939/electronic_control_unit.py
index ecfce9e..16fb98e 100644
--- a/j1939/electronic_control_unit.py
+++ b/j1939/electronic_control_unit.py
@@ -336,9 +336,6 @@ def _async_job_thread(self):
                     # do nothing
                     pass
 
-        if system.startswith("win32") or system.startswith("cygwin"):
-            pythoncom.CoUninitialize()
-
     def _job_thread_wakeup(self):
         """Wakeup the async job thread