diff --git a/stackalytics/processor/vcs.py b/stackalytics/processor/vcs.py
index b8b533f5e..d194026c0 100644
--- a/stackalytics/processor/vcs.py
+++ b/stackalytics/processor/vcs.py
@@ -65,7 +65,7 @@ GIT_LOG_PATTERN = re.compile(''.join([(r[0] + ':(.*?)\n')
                              'diff_stat:(?P<diff_stat>.+?)(?=commit|\Z)',
                              re.DOTALL)
 
-CO_AUTHOR_PATTERN_RAW = ('(?P<author_name>.+?)\s*'
+CO_AUTHOR_PATTERN_RAW = ('(?P<author_name>.*?)\s*'
                          '<?(?P<author_email>[\w\.-]+@[\w\.-]+)>?')
 CO_AUTHOR_PATTERN = re.compile(CO_AUTHOR_PATTERN_RAW, re.IGNORECASE)
 
diff --git a/stackalytics/tests/unit/test_vcs.py b/stackalytics/tests/unit/test_vcs.py
index 5b636c8a7..200d4622e 100644
--- a/stackalytics/tests/unit/test_vcs.py
+++ b/stackalytics/tests/unit/test_vcs.py
@@ -135,6 +135,7 @@ Co-Authored-By: Tupac Shakur <tupac.shakur@openstack.com>
 Also: Bob Dylan <bob.dylan@openstack.com>
 Co-Authored: Anonymous <correct@email.com>
 Co-Author-By: Anonymous2 <correct@email2.com>
+co-authored-by: brian.tully@hp.com
 Co-Author: Winnie the Pooh winnie222@openstack.org
 
 diff_stat:
@@ -217,3 +218,8 @@ diff_stat:
             {'author_name': 'Winnie the Pooh',
              'author_email': 'winnie222@openstack.org'},
             commits[7]['coauthor'])
+
+        self.assertIn(
+            {'author_name': '',
+             'author_email': 'brian.tully@hp.com'},
+            commits[7]['coauthor'])