diff --git a/src/calibre/gui2/convert/heuristics.py b/src/calibre/gui2/convert/heuristics.py
index 2b9df50457..904804f32e 100644
--- a/src/calibre/gui2/convert/heuristics.py
+++ b/src/calibre/gui2/convert/heuristics.py
@@ -21,7 +21,7 @@ class HeuristicsWidget(Widget, Ui_Form):
                  'italicize_common_cases', 'fix_indents',
                  'html_unwrap_factor', 'unwrap_lines',
                  'delete_blank_paragraphs', 'format_scene_breaks',
-                 'dehyphenate']
+                 'dehyphenate', 'renumber_headings']
                 )
         self.db, self.book_id = db, book_id
         self.initialize_options(get_option, get_help, db, book_id)
@@ -53,6 +53,7 @@ class HeuristicsWidget(Widget, Ui_Form):
         self.opt_delete_blank_paragraphs.setEnabled(state)
         self.opt_format_scene_breaks.setEnabled(state)
         self.opt_dehyphenate.setEnabled(state)
+        self.opt_renumber_headings(state)
         
         self.opt_unwrap_lines.setEnabled(state)
         if state and self.opt_unwrap_lines.checkState() == Qt.Checked:
diff --git a/src/calibre/gui2/convert/heuristics.ui b/src/calibre/gui2/convert/heuristics.ui
index e64e79e1df..c5f3c2cb3e 100644
--- a/src/calibre/gui2/convert/heuristics.ui
+++ b/src/calibre/gui2/convert/heuristics.ui
@@ -6,7 +6,7 @@
    <rect>
     <x>0</x>
     <y>0</y>
-    <width>657</width>
+    <width>811</width>
     <height>479</height>
    </rect>
   </property>
@@ -80,42 +80,42 @@
         </property>
        </widget>
       </item>
-      <item row="3" column="0" colspan="2">
+      <item row="4" column="0" colspan="2">
        <widget class="QCheckBox" name="opt_delete_blank_paragraphs">
         <property name="text">
          <string>Delete blank lines between paragraphs</string>
         </property>
        </widget>
       </item>
-      <item row="4" column="0" colspan="2">
+      <item row="5" column="0" colspan="2">
        <widget class="QCheckBox" name="opt_format_scene_breaks">
         <property name="text">
          <string>Ensure scene breaks are consistently formatted</string>
         </property>
        </widget>
       </item>
-      <item row="5" column="0" colspan="2">
+      <item row="6" column="0" colspan="2">
        <widget class="QCheckBox" name="opt_dehyphenate">
         <property name="text">
          <string>Remove unnecessary hyphens</string>
         </property>
        </widget>
       </item>
-      <item row="6" column="0" colspan="2">
+      <item row="7" column="0" colspan="2">
        <widget class="QCheckBox" name="opt_italicize_common_cases">
         <property name="text">
          <string>Italicize common words and patterns</string>
         </property>
        </widget>
       </item>
-      <item row="7" column="0" colspan="2">
+      <item row="8" column="0" colspan="2">
        <widget class="QCheckBox" name="opt_fix_indents">
         <property name="text">
          <string>Replace entity indents with CSS indents</string>
         </property>
        </widget>
       </item>
-      <item row="8" column="0">
+      <item row="9" column="0">
        <spacer name="verticalSpacer">
         <property name="orientation">
          <enum>Qt::Vertical</enum>
@@ -141,6 +141,13 @@
         </property>
        </spacer>
       </item>
+      <item row="3" column="0">
+       <widget class="QCheckBox" name="opt_renumber_headings">
+        <property name="text">
+         <string>Renumber sequences of &lt;h1&gt; or &lt;h2&gt; tags to prevent splitting</string>
+        </property>
+       </widget>
+      </item>
      </layout>
     </widget>
    </item>