diff --git a/config/example_config.toml b/config/example_config.toml
index 1c78a9334..f01b25dc6 100644
--- a/config/example_config.toml
+++ b/config/example_config.toml
@@ -177,6 +177,7 @@
     _pool = 'error'
     _state = 'info'
     _sync = 'error'
+    _zmq = 'info'
     default = 'info'
 
 # `grpc` contains configuration of the gRPC module.