diff --git a/lib/core/settings.py b/lib/core/settings.py
index 614a252dd..ecd985952 100644
--- a/lib/core/settings.py
+++ b/lib/core/settings.py
@@ -129,7 +129,7 @@ PLATFORM = os.name
 PYVERSION = sys.version.split()[0]
 
 # Database management system specific variables
-MSSQL_SYSTEM_DBS = ( "Northwind", "model", "msdb", "pubs", "tempdb" )
+MSSQL_SYSTEM_DBS = ( "Northwind", "master", "model", "msdb", "pubs", "tempdb" )
 MYSQL_SYSTEM_DBS = ( "information_schema", "mysql" )                   # Before MySQL 5.0 only "mysql"
 PGSQL_SYSTEM_DBS = ( "information_schema", "pg_catalog", "pg_toast" )
 ORACLE_SYSTEM_DBS = ( "SYSTEM", "SYSAUX", "SYS" )                      # These are TABLESPACE_NAME