diff --git a/packages/helloworld/.gitignore b/packages/helloworld/.gitignore
index 08e1a6b5935..a5d48a127bd 100644
--- a/packages/helloworld/.gitignore
+++ b/packages/helloworld/.gitignore
@@ -30,6 +30,7 @@ local.properties
 .cxx/
 *.keystore
 !debug.keystore
+.kotlin/
 
 # node.js
 node_modules/