diff --git a/bitbake/lib/bb/server/process.py b/bitbake/lib/bb/server/process.py
index efb4332394..81617acd96 100644
--- a/bitbake/lib/bb/server/process.py
+++ b/bitbake/lib/bb/server/process.py
@@ -499,7 +499,8 @@ def connectProcessServer(sockname, featureset):
             command_chan.close()
         for i in [writefd, readfd1, writefd2]:
             try:
-                os.close(i)
+                if i:
+                    os.close(i)
             except OSError:
                 pass
         sock.close()