diff --git a/neutron/plugins/vmware/dbexts/lsn_db.py b/neutron/plugins/vmware/dbexts/lsn_db.py
index 30a3bda805..25a457ac7d 100644
--- a/neutron/plugins/vmware/dbexts/lsn_db.py
+++ b/neutron/plugins/vmware/dbexts/lsn_db.py
@@ -35,7 +35,8 @@ class LsnPort(models_v2.model_base.BASEV2):
 
     lsn_port_id = Column(String(36), primary_key=True)
 
-    lsn_id = Column(String(36), ForeignKey('lsn.lsn_id', ondelete="CASCADE"))
+    lsn_id = Column(String(36), ForeignKey('lsn.lsn_id', ondelete="CASCADE"),
+                    nullable=False)
     sub_id = Column(String(36), nullable=False, unique=True)
     mac_addr = Column(String(32), nullable=False, unique=True)
 
diff --git a/neutron/plugins/vmware/dbexts/models.py b/neutron/plugins/vmware/dbexts/models.py
index 69c146be91..3563328118 100644
--- a/neutron/plugins/vmware/dbexts/models.py
+++ b/neutron/plugins/vmware/dbexts/models.py
@@ -91,7 +91,7 @@ class NeutronNsxPortMapping(model_base.BASEV2):
                         ForeignKey('ports.id', ondelete="CASCADE"),
                         primary_key=True)
     nsx_switch_id = Column(String(36))
-    nsx_port_id = Column(String(36))
+    nsx_port_id = Column(String(36), nullable=False)
 
     def __init__(self, neutron_id, nsx_switch_id, nsx_port_id):
         self.neutron_id = neutron_id