diff --git a/neutron/services/loadbalancer/agent_scheduler.py b/neutron/services/loadbalancer/agent_scheduler.py
index 2ace1db6e2..a17e528d17 100644
--- a/neutron/services/loadbalancer/agent_scheduler.py
+++ b/neutron/services/loadbalancer/agent_scheduler.py
@@ -39,7 +39,8 @@ class PoolLoadbalancerAgentBinding(model_base.BASEV2):
                         primary_key=True)
     agent = orm.relation(agents_db.Agent)
     agent_id = sa.Column(sa.String(36), sa.ForeignKey("agents.id",
-                                                      ondelete='CASCADE'))
+                                                      ondelete='CASCADE'),
+                         nullable=False)
 
 
 class LbaasAgentSchedulerDbMixin(agentschedulers_db.AgentSchedulerDbMixin,