diff --git a/artiq/protocols/sync_struct.py b/artiq/protocols/sync_struct.py
index 35e75195a..02db70ffc 100644
--- a/artiq/protocols/sync_struct.py
+++ b/artiq/protocols/sync_struct.py
@@ -155,6 +155,8 @@ class Subscriber:
 
                 for notify_cb in self.notify_cbs:
                     notify_cb(mod)
+        except ConnectionError:
+            pass
         finally:
             if self.disconnect_cb is not None:
                 self.disconnect_cb()