diff --git a/widgets/mainwindow.ui b/widgets/mainwindow.ui
index 59fbd7f7d..288ce9a57 100644
--- a/widgets/mainwindow.ui
+++ b/widgets/mainwindow.ui
@@ -1,5 +1,4 @@
 <?xml version="1.0" encoding="utf-8"?>
-<?xml version="1.0" encoding="UTF-8"?>
 <ui version="4.0">
  <class>MainWindow</class>
  <widget class="QMainWindow" name="MainWindow">