diff --git a/NEWS b/NEWS
index 1d70e29bc..26eabb35d 100644
--- a/NEWS
+++ b/NEWS
@@ -46,6 +46,7 @@ Bug fixes
  - fixed HTML formatting of appointment notifications for Outlook (#2233)
  - replace slashes by dashes in filenames of attachments to avoid a 404 return code (#2537)
  - avoid over-using LDAP connections when decomposing groups
+ - fixed display of a contact's birthday when not defined (#2503)
 
 2.1.1b (2013-12-04)
 -------------------
diff --git a/SoObjects/Contacts/NGVCard+SOGo.m b/SoObjects/Contacts/NGVCard+SOGo.m
index 88d3e99f1..e13cbfffe 100644
--- a/SoObjects/Contacts/NGVCard+SOGo.m
+++ b/SoObjects/Contacts/NGVCard+SOGo.m
@@ -776,7 +776,7 @@ convention:
 
   bday = [self bday];
   date = nil;
-  if (bday)
+  if ([bday length] > 0)
     {
       // Expected format of BDAY is YYYY[-]MM[-]DD
       value = [bday stringByReplacingString: @"-" withString: @""];