diff --git a/src/html_epub_preprocessor.py b/src/html_epub_preprocessor.py
index e7a3958..6d04ddc 100644
--- a/src/html_epub_preprocessor.py
+++ b/src/html_epub_preprocessor.py
@@ -260,7 +260,7 @@ def unwrap_structural_tags(body_tag):
     # should be before other tags processing, not to remove converter empty tags with id
     # not all cases, if span has <p>s and NavigableString, it won't unwrap
     for s in body_tag.find_all("span"):
-        if s.attrs.get('epub:type') == 'pagebreak':
+        if (s.attrs.get('epub:type') == 'pagebreak') or s.attrs.get('id'):
             continue
         if s.contents:
             is_not_struct_tag = [child.name not in structural_tags_names for child in s.contents]