diff --git a/build.sh b/build.sh
index cb6300f646..0722244307 100755
--- a/build.sh
+++ b/build.sh
@@ -63,6 +63,7 @@ echo '[BUILD] Copying release files'
 cp license.txt $plugin_name
 cp index.php $plugin_name
 cp $plugin_name.php $plugin_name
+cp mailpoet_initializer.php $plugin_name
 cp readme.txt $plugin_name
 cp uninstall.php $plugin_name