diff --git a/feedgen/entry.py b/feedgen/entry.py
index 7527bf3..6810843 100644
--- a/feedgen/entry.py
+++ b/feedgen/entry.py
@@ -333,11 +333,14 @@ class FeedEntry(object):
                 self.__atom_author = []
             self.__atom_author += ensure_format(author,
                                                 set(['name', 'email', 'uri']),
-                                                set(['name']))
+                                                set())
             self.__rss_author = []
             for a in self.__atom_author:
                 if a.get('email'):
-                    self.__rss_author.append('%(email)s (%(name)s)' % a)
+                    if a.get('name'):
+                        self.__rss_author.append('%(email)s (%(name)s)' % a)
+                    else:
+                        self.__rss_author.append('%(email)s' % a)
         return self.__atom_author
 
     def content(self, content=None, src=None, type=None):
diff --git a/tests/test_entry.py b/tests/test_entry.py
index 2b986cf..6b56880 100644
--- a/tests/test_entry.py
+++ b/tests/test_entry.py
@@ -63,7 +63,11 @@ class TestSequenceFunctions(unittest.TestCase):
         fe = self.fg.add_item()
         fe.title('qwe')
         assert fe.title() == 'qwe'
-        author = fe.author(name='John Doe', email='jdoe@example.com')[0]
+        author = fe.author(email='ldoe@example.com')[0]
+        assert not author.get('name')
+        assert author.get('email') == 'ldoe@example.com'
+        author = fe.author(name='John Doe', email='jdoe@example.com',
+                           replace=True)[0]
         assert author.get('name') == 'John Doe'
         assert author.get('email') == 'jdoe@example.com'
         contributor = fe.contributor(name='John Doe', email='jdoe@ex.com')[0]