diff --git a/doc/conf.py b/doc/conf.py
index e102c155d..299f321ac 100644
--- a/doc/conf.py
+++ b/doc/conf.py
@@ -34,7 +34,7 @@ epub_author = 'Georg Brandl'
 epub_publisher = 'http://sphinx.pocoo.org/'
 epub_scheme = 'url'
 epub_identifier = epub_publisher
-epub_pre_files = [('index', 'Welcome')]
+epub_pre_files = [('index.html', 'Welcome')]
 epub_exclude_files = ['_static/opensearch.xml', '_static/doctools.js',
     '_static/jquery.js', '_static/searchtools.js', '_static/underscore.js',
     '_static/basic.css', 'search.html']
diff --git a/sphinx/builders/epub.py b/sphinx/builders/epub.py
index 47984be6b..fdfab7190 100644
--- a/sphinx/builders/epub.py
+++ b/sphinx/builders/epub.py
@@ -230,13 +230,13 @@ class EpubBuilder(StandaloneHTMLBuilder):
         for file, text in reversed(self.config.epub_pre_files):
             self.refnodes.insert(0, {
                 'level': 1,
-                'refuri': self.esc(file + '.html'),
+                'refuri': self.esc(file),
                 'text': ssp(self.esc(text))
             })
         for file, text in self.config.epub_post_files:
             self.refnodes.append({
                 'level': 1,
-                'refuri': self.esc(file + '.html'),
+                'refuri': self.esc(file),
                 'text': ssp(self.esc(text))
             })