diff --git a/src/wp-admin/network/site-new.php b/src/wp-admin/network/site-new.php
index 2d97c04093..3d226d3a0b 100644
--- a/src/wp-admin/network/site-new.php
+++ b/src/wp-admin/network/site-new.php
@@ -83,6 +83,10 @@ if ( isset( $_REQUEST['action'] ) && 'add-site' === $_REQUEST['action'] ) {
 		}
 	}
 
+	if ( empty( $title ) ) {
+		wp_die( __( 'Missing site title.' ) );
+	}
+
 	if ( empty( $domain ) ) {
 		wp_die( __( 'Missing or invalid site address.' ) );
 	}