diff --git a/src/calibre/utils/Zeroconf.py b/src/calibre/utils/Zeroconf.py
index fbb9b4e71f..2b3661162f 100755
--- a/src/calibre/utils/Zeroconf.py
+++ b/src/calibre/utils/Zeroconf.py
@@ -869,7 +869,8 @@ class Engine(threading.Thread):
                             if DEBUG:
                                 traceback.print_exc()
                         except:
-                            traceback.print_exc()
+                            if DEBUG:
+                                traceback.print_exc()
                 except:
                     pass