diff --git a/src/frontends/qt4/ui/LineUi.ui b/src/frontends/qt4/ui/LineUi.ui
index de23217061..546418cad7 100644
--- a/src/frontends/qt4/ui/LineUi.ui
+++ b/src/frontends/qt4/ui/LineUi.ui
@@ -99,11 +99,7 @@
       <bool>true</bool>
      </property>
      <property name="toolTip">
-      <string>&lt;!DOCTYPE HTML PUBLIC &quot;-//W3C//DTD HTML 4.0//EN&quot; &quot;http://www.w3.org/TR/REC-html40/strict.dtd&quot;&gt;
-&lt;html&gt;&lt;head&gt;&lt;meta name=&quot;qrichtext&quot; content=&quot;1&quot; /&gt;&lt;style type=&quot;text/css&quot;&gt;
-p, li { white-space: pre-wrap; }
-&lt;/style&gt;&lt;/head&gt;&lt;body style=&quot; font-family:'MS Shell Dlg 2'; font-size:8.25pt; font-weight:400; font-style:normal;&quot;&gt;
-&lt;p style=&quot; margin-top:0px; margin-bottom:0px; margin-left:0px; margin-right:0px; -qt-block-indent:0; text-indent:0px;&quot;&gt;&lt;span style=&quot; font-size:8pt;&quot;&gt;Value of the line thickness.&lt;/span&gt;&lt;/p&gt;&lt;/body&gt;&lt;/html&gt;</string>
+      <string>Value of the line thickness.</string>
      </property>
     </widget>
    </item>