diff --git a/packages/core/src/network/client.ts b/packages/core/src/network/client.ts
index 5163a02f..6e793e7d 100644
--- a/packages/core/src/network/client.ts
+++ b/packages/core/src/network/client.ts
@@ -238,7 +238,7 @@ export class MtClient extends EventEmitter {
 
     readonly _config = new ConfigManager(() => this.call({ _: 'help.getConfig' }))
 
-    emitError: (err: unknown, connection?: SessionConnection) => void = console.error.bind(console)
+    private _emitError?: (err: unknown, connection?: SessionConnection) => void
 
     readonly log: Logger
     readonly network: NetworkManager
@@ -310,6 +310,14 @@ export class MtClient extends EventEmitter {
         )
     }
 
+    emitError(err: unknown, connection?: SessionConnection): void {
+        if (this._emitError) {
+            this._emitError(err, connection)
+        } else {
+            this.log.error('unhandled error:', err)
+        }
+    }
+
     private _prepare = asyncResettable(async () => {
         await this.crypto.initialize?.()
         await this.storage.load()