diff --git a/src/calibre/ebooks/fb2/fb2ml.py b/src/calibre/ebooks/fb2/fb2ml.py
index 5efc360f1f..89c12db103 100644
--- a/src/calibre/ebooks/fb2/fb2ml.py
+++ b/src/calibre/ebooks/fb2/fb2ml.py
@@ -297,18 +297,6 @@ class FB2MLizer(object):
             s_out, s_tags = self.handle_simple_tag('emphasis', tag_stack+tags)
             fb2_out += s_out
             tags += s_tags
-        elif tag in ('del', 'strike'):
-            s_out, s_tags = self.handle_simple_tag('strikethrough', tag_stack+tags)
-            fb2_out += s_out
-            tags += s_tags
-        elif tag == 'sub':
-            s_out, s_tags = self.handle_simple_tag('sub', tag_stack+tags)
-            fb2_out += s_out
-            tags += s_tags
-        elif tag == 'sup':
-            s_out, s_tags = self.handle_simple_tag('sup', tag_stack+tags)
-            fb2_out += s_out
-            tags += s_tags
 
         # Processes style information.
         if style['font-style'] == 'italic':
@@ -319,10 +307,6 @@ class FB2MLizer(object):
             s_out, s_tags = self.handle_simple_tag('strong', tag_stack+tags)
             fb2_out += s_out
             tags += s_tags
-        elif style['text-decoration'] == 'line-through':
-            s_out, s_tags = self.handle_simple_tag('strikethrough', tag_stack+tags)
-            fb2_out += s_out
-            tags += s_tags
 
         # Process element text.
         if hasattr(elem_tree, 'text') and elem_tree.text: