diff --git a/bitbake/lib/bb/cooker.py b/bitbake/lib/bb/cooker.py
index d100b96f53..df4acca18a 100644
--- a/bitbake/lib/bb/cooker.py
+++ b/bitbake/lib/bb/cooker.py
@@ -1745,7 +1745,8 @@ class BBCooker:
     def post_serve(self):
         self.shutdown(force=True)
         prserv.serv.auto_shutdown()
-        bb.parse.siggen.exit()
+        if hasattr(bb.parse, "siggen"):
+            bb.parse.siggen.exit()
         if self.hashserv:
             self.hashserv.process.terminate()
             self.hashserv.process.join()