diff --git a/CHANGELOG.TXT b/CHANGELOG.TXT
index f20d749e..4ea851b6 100644
--- a/CHANGELOG.TXT
+++ b/CHANGELOG.TXT
@@ -16,6 +16,8 @@ Changes after 2.3.3 release (postfixadmin-2.3 branch)
   - generate more secure random passwords
   - squirrelmail plugin: fix typo in variable name
   - list-domain: fix SELECT query to work with PgSQL even when using custom fields
+  - create-domain: force domain name to lowercase to avoid problems with PgSQL
+    foreign keys
 
 Version 2.3.3 - 2011/03/14 - SVN r1010 (postfixadmin-2.3 branch)
 ---------------------------------------------------------------
diff --git a/create-domain.php b/create-domain.php
index 9633de44..46d7dc73 100644
--- a/create-domain.php
+++ b/create-domain.php
@@ -71,6 +71,9 @@ foreach($form_fields  as $key => $default) {
         }
     }
 }
+
+$fDomain = strtolower($fDomain);
+
 if ($_SERVER['REQUEST_METHOD'] == "GET")
 {
     /* default values as set above */