diff --git a/README.md b/README.md
index 935be5e..91a8033 100644
--- a/README.md
+++ b/README.md
@@ -145,7 +145,7 @@ stunnel.connect({
     httpsServer.emit('connection', myDuplex);
 
     if (cb) {
-      cb();
+      process.nextTick(cb);
     }
 
     return myDuplex2;