diff --git a/src/calibre/gui2/dialogs/lrf_single.py b/src/calibre/gui2/dialogs/lrf_single.py
index 9f905c4458..9083d3e4df 100644
--- a/src/calibre/gui2/dialogs/lrf_single.py
+++ b/src/calibre/gui2/dialogs/lrf_single.py
@@ -253,6 +253,7 @@ class LRFSingleDialog(QDialog, Ui_LRFSingleDialog):
                 state = Qt.Checked if default else Qt.Unchecked
                 obj.setCheckState(state)
         self.gui_headerformat.setDisabled(True)
+        self.gui_header_separation.setDisabled(True)
         self.gui_use_metadata_cover.setCheckState(Qt.Checked)
         self.preprocess.addItem('No preprocessing')
         for opt in self.PREPROCESS_OPTIONS:
diff --git a/src/calibre/gui2/dialogs/lrf_single.ui b/src/calibre/gui2/dialogs/lrf_single.ui
index 12b7bb44f5..1167c1f8f2 100644
--- a/src/calibre/gui2/dialogs/lrf_single.ui
+++ b/src/calibre/gui2/dialogs/lrf_single.ui
@@ -120,7 +120,7 @@
        <item>
         <widget class="QStackedWidget" name="stack" >
          <property name="currentIndex" >
-          <number>0</number>
+          <number>1</number>
          </property>
          <widget class="QWidget" name="metadata_page" >
           <layout class="QHBoxLayout" name="_2" >
@@ -1055,5 +1055,37 @@ p, li { white-space: pre-wrap; }
     </hint>
    </hints>
   </connection>
+  <connection>
+   <sender>gui_header</sender>
+   <signal>toggled(bool)</signal>
+   <receiver>gui_header_separation</receiver>
+   <slot>setEnabled(bool)</slot>
+   <hints>
+    <hint type="sourcelabel" >
+     <x>235</x>
+     <y>298</y>
+    </hint>
+    <hint type="destinationlabel" >
+     <x>361</x>
+     <y>321</y>
+    </hint>
+   </hints>
+  </connection>
+  <connection>
+   <sender>gui_header</sender>
+   <signal>toggled(bool)</signal>
+   <receiver>gui_headerformat</receiver>
+   <slot>setEnabled(bool)</slot>
+   <hints>
+    <hint type="sourcelabel" >
+     <x>307</x>
+     <y>300</y>
+    </hint>
+    <hint type="destinationlabel" >
+     <x>363</x>
+     <y>362</y>
+    </hint>
+   </hints>
+  </connection>
  </connections>
 </ui>