diff --git a/src/server_mgr_main.py b/src/server_mgr_main.py
index 8cfe6554..04e040c3 100755
--- a/src/server_mgr_main.py
+++ b/src/server_mgr_main.py
@@ -3596,7 +3596,7 @@ def is_cluster_ext_lb(self, cluster):
         cluster_params = eval(cluster['parameters'])
         cluster_provision_params = cluster_params.get("provision", {})
         if cluster_provision_params:
-            cluster_params_lb = cluster_provision_params['contrail']
+            cluster_params_lb = cluster_provision_params.get("contrail", {})
             if cluster_params_lb.get('loadbalancer', None):
                 return True
         return False