diff --git a/src/calibre/ebooks/docx/writer/from_html.py b/src/calibre/ebooks/docx/writer/from_html.py
index e588c4fa33..876ced57ad 100644
--- a/src/calibre/ebooks/docx/writer/from_html.py
+++ b/src/calibre/ebooks/docx/writer/from_html.py
@@ -76,7 +76,13 @@ class TextStyle(object):
             getattr(self, x) for x in self.ALL_PROPS))
 
     def __eq__(self, other):
-        return hash(self) == hash(other)
+        for x in self.ALL_PROPS:
+            if getattr(self, x) != getattr(other, x, None):
+                return False
+        return True
+
+    def __ne__(self, other):
+        return not self == other
 
 class LineBreak(object):