diff --git a/plugins/dbms/mssqlserver/enumeration.py b/plugins/dbms/mssqlserver/enumeration.py
index a6a93044f..e1bb3979c 100644
--- a/plugins/dbms/mssqlserver/enumeration.py
+++ b/plugins/dbms/mssqlserver/enumeration.py
@@ -242,6 +242,9 @@ class Enumeration(GenericEnumeration):
                             values = [ values ]
 
                         for foundTbl in values:
+                            if foundTbl is None:
+                                continue
+
                             if foundTbl not in dbs[db]:
                                 dbs[db][foundTbl] = {}