diff --git a/src/frontends/qt4/ui/PrefPlaintextUi.ui b/src/frontends/qt4/ui/PrefPlaintextUi.ui
index c3db2fc73f..6b012b069b 100644
--- a/src/frontends/qt4/ui/PrefPlaintextUi.ui
+++ b/src/frontends/qt4/ui/PrefPlaintextUi.ui
@@ -1,4 +1,3 @@
-<?xml version="1.0" encoding="UTF-8"?>
 <ui version="4.0">
  <class>PrefPlaintextUi</class>
  <widget class="QWidget" name="PrefPlaintextUi">