diff --git a/src/js/helpers/detectColorScheme.js b/src/js/helpers/detectColorScheme.js
index ea6601aa4..12dd7822a 100644
--- a/src/js/helpers/detectColorScheme.js
+++ b/src/js/helpers/detectColorScheme.js
@@ -1,4 +1,27 @@
-function detectColorScheme() {
+/*
+ * @copyright Copyright (c) 2019 Rene Gieling <github@dartcafe.de>
+ *
+ * @author Rene Gieling <github@dartcafe.de>
+ * @author Julius Härtl <jus@bitgrid.net>
+ *
+ * @license GNU AGPL version 3 or any later version
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as
+ * published by the Free Software Foundation, either version 3 of the
+ * License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+const detectColorScheme = function() {
 	if (!window.matchMedia) {
 		return true
 	} else if (window.matchMedia('(prefers-color-scheme: dark)').matches) {
@@ -7,4 +30,4 @@ function detectColorScheme() {
 	}
 }
 
-export default { detectColorScheme }
+export default detectColorScheme