diff --git a/woocommerce.php b/woocommerce.php
index a1b59eb2a9e..21c5829350f 100644
--- a/woocommerce.php
+++ b/woocommerce.php
@@ -174,6 +174,7 @@ final class WooCommerce {
 		add_action( 'init', array( $this, 'init' ), 0 );
 		add_action( 'init', array( 'WC_Shortcodes', 'init' ) );
 		add_action( 'init', array( 'WC_Emails', 'init_transactional_emails' ) );
+		add_action( 'send_queued_transactional_email', array( 'WC_Emails', 'send_queued_transactional_email' ), 10, 2 );
 		add_action( 'init', array( $this, 'wpdb_table_fix' ), 0 );
 		add_action( 'switch_blog', array( $this, 'wpdb_table_fix' ), 0 );
 	}