diff --git a/src/web/app/mobile/mixins.js b/src/web/app/mobile/mixins.js
index cd344d32e0..be0e0d155e 100644
--- a/src/web/app/mobile/mixins.js
+++ b/src/web/app/mobile/mixins.js
@@ -5,7 +5,7 @@ module.exports = me => {
 		require('./scripts/stream')(me);
 	}
 
-	require('./scripts/ui.ls');
+	require('./scripts/ui');
 
 	riot.mixin('open-post-form', {
 		openPostForm: opts => {
diff --git a/src/web/app/mobile/scripts/ui.js b/src/web/app/mobile/scripts/ui.js
new file mode 100644
index 0000000000..51ab6acd2d
--- /dev/null
+++ b/src/web/app/mobile/scripts/ui.js
@@ -0,0 +1,7 @@
+const riot = require('riot');
+
+const ui = riot.observable();
+
+riot.mixin('ui', {
+	ui: ui
+});
diff --git a/src/web/app/mobile/scripts/ui.ls b/src/web/app/mobile/scripts/ui.ls
deleted file mode 100644
index aa94a8b052..0000000000
--- a/src/web/app/mobile/scripts/ui.ls
+++ /dev/null
@@ -1,6 +0,0 @@
-riot = require \riot
-
-ui = riot.observable!
-
-riot.mixin \ui do
-	ui: ui