diff --git a/src/calibre/gui2/tweak_book/editor/text.py b/src/calibre/gui2/tweak_book/editor/text.py
index 1f613516a4..974e977e3b 100644
--- a/src/calibre/gui2/tweak_book/editor/text.py
+++ b/src/calibre/gui2/tweak_book/editor/text.py
@@ -865,7 +865,7 @@ class TextEdit(PlainTextEdit):
             'bold': ('<b>', '</b>'),
             'italic': ('<i>', '</i>'),
             'underline': ('<u>', '</u>'),
-            'strikethrough': ('<strike>', '</strike>'),
+            'strikethrough': ('<s>', '</s>'),
             'superscript': ('<sup>', '</sup>'),
             'subscript': ('<sub>', '</sub>'),
             'color': ('<span style="color: %s">' % color, '</span>'),