diff --git a/api/js/jsapi/egw_open.js b/api/js/jsapi/egw_open.js
index b7475ca7f3..a04ce43663 100644
--- a/api/js/jsapi/egw_open.js
+++ b/api/js/jsapi/egw_open.js
@@ -224,7 +224,7 @@ egw.extend('open', egw.MODULE_WND_LOCAL, function(_egw, _wnd)
 				url = this.link(url, params);
 			}
 			if (target == '_tab') return {url: url};
-			if (type == 'view'  && params.target == 'tab') {
+			if (type == 'view'  && params && params.target == 'tab') {
 				return this.openTab(params[app_registry['view_id']], app, type, params, {
 					id: params[app_registry['view_id']] + '-' + this.appName,
 					icon: params['icon'],