diff --git a/lib/bb/cooker.py b/lib/bb/cooker.py
index 1fd2c13..a000f72 100644
--- a/lib/bb/cooker.py
+++ b/lib/bb/cooker.py
@@ -1603,6 +1603,7 @@ class CookerParser(object):
 
             self.parser_quit.cancel_join_thread()
             for process in self.processes:
+                process.terminate()
                 self.parser_quit.put(None)
 
             self.jobs.cancel_join_thread()