diff --git a/src/web/app/desktop/mixins.ls b/src/web/app/desktop/mixins.ls
index 900d7ee19..cb3c93a3d 100644
--- a/src/web/app/desktop/mixins.ls
+++ b/src/web/app/desktop/mixins.ls
@@ -6,7 +6,7 @@ module.exports = (me) ~>
 
 	require './scripts/user-preview'
 
-	require './scripts/open-window.ls'
+	require './scripts/open-window'
 
 	riot.mixin \notify do
 		notify: require './scripts/notify.ls'
diff --git a/src/web/app/desktop/scripts/open-window.js b/src/web/app/desktop/scripts/open-window.js
new file mode 100644
index 000000000..3f7cc424e
--- /dev/null
+++ b/src/web/app/desktop/scripts/open-window.js
@@ -0,0 +1,8 @@
+const riot = require('riot');
+
+riot.mixin('open-window', {
+	openWindow: (name, opts) => {
+		const window = document.body.appendChild(document.createElement(name));
+		return riot.mount(window, opts)[0];
+	}
+});
diff --git a/src/web/app/desktop/scripts/open-window.ls b/src/web/app/desktop/scripts/open-window.ls
deleted file mode 100644
index 4388272ec..000000000
--- a/src/web/app/desktop/scripts/open-window.ls
+++ /dev/null
@@ -1,8 +0,0 @@
-riot = require \riot
-
-function open(name, opts)
-	window = document.body.append-child document.create-element name
-	riot.mount window, opts
-
-riot.mixin \open-window do
-	open-window: open