diff --git a/src/calibre/gui2/preferences/look_feel.ui b/src/calibre/gui2/preferences/look_feel.ui
index 7a7966ce07..c492cd7f74 100644
--- a/src/calibre/gui2/preferences/look_feel.ui
+++ b/src/calibre/gui2/preferences/look_feel.ui
@@ -1270,6 +1270,9 @@ structure and you want to use the same column order for each one.&lt;/p&gt;</str
        </item>
        <item>
         <layout class="QFormLayout" name="formLayout">
+         <property name="fieldGrowthPolicy">
+          <enum>QFormLayout::ExpandingFieldsGrow</enum>
+         </property>
          <item row="0" column="0">
           <widget class="QLabel" name="label_9">
            <property name="text">