diff --git a/src/calibre/ebooks/pml/pmlconverter.py b/src/calibre/ebooks/pml/pmlconverter.py
index c72a21a5f9..7133e3f251 100644
--- a/src/calibre/ebooks/pml/pmlconverter.py
+++ b/src/calibre/ebooks/pml/pmlconverter.py
@@ -41,14 +41,14 @@ PML_HTML_RULES = [
     (re.compile(r'\\q="(?P<target>#.+?)"(?P<text>.*?)\\q', re.DOTALL), lambda match: '<a href="%s">%s</a>' % (match.group('target'), match.group('text')) if match.group('text') else ''),
     (re.compile(r'\\Q="(?P<target>.+?)"'), lambda match: '<span id="%s"></span>' % match.group('target')),
     (re.compile(r'\\-'), lambda match: ''),
-    (re.compile(r'\\Fn="(?P<target>.+?)"(?P<text>.*?)\\Fn'), lambda match: '<a href="#footnote-%s">%s</a>' % (match.group('target'), match.group('text')) if match.group('text') else ''),
-    (re.compile(r'\\Sd="(?P<target>.+?)"(?P<text>.*?)\\Sd'), lambda match: '<a href="#sidebar-%s">%s</a>' % (match.group('target'), match.group('text')) if match.group('text') else ''),
+    (re.compile(r'\\Fn="(?P<target>.+?)"(?P<text>.*?)\\Fn'), lambda match: '<a href="#fns-%s">%s</a>' % (match.group('target'), match.group('text')) if match.group('text') else ''),
+    (re.compile(r'\\Sd="(?P<target>.+?)"(?P<text>.*?)\\Sd'), lambda match: '<a href="#fns-%s">%s</a>' % (match.group('target'), match.group('text')) if match.group('text') else ''),
     # Just italicize index items as that is how the eReader software renders them.
     (re.compile(r'\\I(?P<text>.*?)\\I', re.DOTALL), lambda match: '<i>%s</i>' % match.group('text') if match.group('text') else ''),
 
     # Sidebar and Footnotes
-    (re.compile(r'<sidebar\s+id="(?P<target>.+?)">\s*(?P<text>.*?)\s*</sidebar>', re.DOTALL), lambda match: '<div id="sidebar-%s">%s</div>' % (match.group('target'), match.group('text')) if match.group('text') else ''),
-    (re.compile(r'<footnote\s+id="(?P<target>.+?)">\s*(?P<text>.*?)\s*</footnote>', re.DOTALL), lambda match: '<div id="footnote-%s">%s</div>' % (match.group('target'), match.group('text')) if match.group('text') else ''),
+    (re.compile(r'<sidebar\s+id="(?P<target>.+?)">\s*(?P<text>.*?)\s*</sidebar>', re.DOTALL), lambda match: '<div id="fns-%s">%s</div>' % (match.group('target'), match.group('text')) if match.group('text') else ''),
+    (re.compile(r'<footnote\s+id="(?P<target>.+?)">\s*(?P<text>.*?)\s*</footnote>', re.DOTALL), lambda match: '<div id="fns-%s">%s</div>' % (match.group('target'), match.group('text')) if match.group('text') else ''),
 
     # eReader files are one paragraph per line.
     # This forces the lines to wrap properly.
@@ -80,5 +80,5 @@ def pml_to_html(pml):
 def footnote_sidebar_to_html(id, pml):
     if id.startswith('\x01'):
         id = id[2:]
-    html = '<div id="sidebar-%s"><dt>%s</dt></div><dd>%s</dd>' % (id, id, pml_to_html(pml))
+    html = '<div id="fns-%s"><dt>%s</dt></div><dd>%s</dd>' % (id, id, pml_to_html(pml))
     return html