diff --git a/src/calibre/ebooks/docx/writer/from_html.py b/src/calibre/ebooks/docx/writer/from_html.py
index ea73def343..6d269efd21 100644
--- a/src/calibre/ebooks/docx/writer/from_html.py
+++ b/src/calibre/ebooks/docx/writer/from_html.py
@@ -404,7 +404,7 @@ class Convert(object):
         self.svg_rasterizer(self.oeb, self.opts)
 
         self.styles_manager = StylesManager(self.docx.namespace, self.log, self.mi.language)
-        self.links_manager = LinksManager(self.docx.namespace, self.docx.document_relationships)
+        self.links_manager = LinksManager(self.docx.namespace, self.docx.document_relationships, self.log)
         self.images_manager = ImagesManager(self.oeb, self.docx.document_relationships)
         self.lists_manager = ListsManager(self.docx)
         self.fonts_manager = FontsManager(self.docx.namespace, self.oeb, self.opts)
@@ -454,7 +454,7 @@ class Convert(object):
         self.current_lang = lang_for_tag(item.data) or self.styles_manager.document_lang
         for i, body in enumerate(XPath('//h:body')(item.data)):
             with self.blocks:
-                body.set('id', body.get('id', None) or self.links_manager.top_anchor)
+                self.links_manager.bookmark_for_anchor(self.links_manager.top_anchor, self.current_item, body)
                 self.process_tag(body, stylizer, is_first_tag=i == 0)
 
     def process_tag(self, html_tag, stylizer, is_first_tag=False, float_spec=None):
diff --git a/src/calibre/ebooks/docx/writer/links.py b/src/calibre/ebooks/docx/writer/links.py
index d41c3edeb5..afaa15b8ee 100644
--- a/src/calibre/ebooks/docx/writer/links.py
+++ b/src/calibre/ebooks/docx/writer/links.py
@@ -61,8 +61,9 @@ def sanitize_bookmark_name(base):
 
 class LinksManager(object):
 
-    def __init__(self, namespace, document_relationships):
+    def __init__(self, namespace, document_relationships, log):
         self.namespace = namespace
+        self.log = log
         self.document_relationships = document_relationships
         self.top_anchor = type('')(uuid4().hex)
         self.anchor_map = {}
@@ -107,6 +108,8 @@ class LinksManager(object):
                 else:
                     bmark = self.anchor_map[(href, self.top_anchor)]
                 return self.namespace.makeelement(parent, 'w:hyperlink', w_anchor=bmark, w_tooltip=tooltip or '')
+            else:
+                self.log.warn('Ignoring internal hyperlink with href (%s) pointing to unknown destination' % url)
         if purl.scheme in {'http', 'https', 'ftp'}:
             if url not in self.external_links:
                 self.external_links[url] = self.document_relationships.add_relationship(url, self.namespace.names['LINKS'], target_mode='External')