diff --git a/src/calibre/ebooks/docx/dump.py b/src/calibre/ebooks/docx/dump.py
index f6432125c5..6ebc2e8871 100644
--- a/src/calibre/ebooks/docx/dump.py
+++ b/src/calibre/ebooks/docx/dump.py
@@ -22,7 +22,7 @@ def dump(path):
         zf.extractall(dest)
 
     for f in walk(dest):
-        if f.endswith('.xml'):
+        if f.endswith('.xml') or f.endswith('.rels'):
             with open(f, 'r+b') as stream:
                 raw = stream.read()
                 root = etree.fromstring(raw)