diff --git a/packages/lib/logging.js b/packages/lib/logging.js
index 97743f56..9dd1068e 100644
--- a/packages/lib/logging.js
+++ b/packages/lib/logging.js
@@ -32,9 +32,14 @@ class ConsoleTransport extends Transport {
 		super(options);
 		this.errorLevels = new Set(options.errorLevels || ["fatal", "error"]);
 		this.warnLevels = new Set(options.warnLevels || ["warn"]);
+		this.filter = options.filter || (() => true);
 	}
 
 	log(info, callback) {
+		if (!this.filter(info)) {
+			return callback();
+		}
+
 		/* eslint-disable no-console */
 		if (this.errorLevels.has(info[LEVEL])) {
 			console.error(info[MESSAGE]);
@@ -44,7 +49,7 @@ class ConsoleTransport extends Transport {
 			console.log(info[MESSAGE]);
 		}
 		/* eslint-enable no-console */
-		callback();
+		return callback();
 	}
 }
 
diff --git a/packages/slave/slave.js b/packages/slave/slave.js
index f58c4c31..ac0cf4b8 100755
--- a/packages/slave/slave.js
+++ b/packages/slave/slave.js
@@ -27,7 +27,7 @@ const libPluginLoader = require("@clusterio/lib/plugin_loader");
 const libErrors = require("@clusterio/lib/errors");
 const libConfig = require("@clusterio/lib/config");
 const libSharedCommands = require("@clusterio/lib/shared_commands");
-const { ConsoleTransport, levels, logger } = require("@clusterio/lib/logging");
+const { ConsoleTransport, FilteredTransport, levels, logger } = require("@clusterio/lib/logging");
 const libLoggingUtils = require("@clusterio/lib/logging_utils");
 
 const Slave = require("./src/Slave");
@@ -126,6 +126,7 @@ async function startSlave() {
 		logger.add(new ConsoleTransport({
 			level: args.logLevel,
 			format: new libLoggingUtils.TerminalFormat(),
+			filter: info => info.instance_id === undefined,
 		}));
 	}