diff --git a/specification/network/resource-manager/Microsoft.Network/stable/2018-08-01/loadBalancer.json b/specification/network/resource-manager/Microsoft.Network/stable/2018-08-01/loadBalancer.json
index d261703c8ac4..4cba44de570c 100644
--- a/specification/network/resource-manager/Microsoft.Network/stable/2018-08-01/loadBalancer.json
+++ b/specification/network/resource-manager/Microsoft.Network/stable/2018-08-01/loadBalancer.json
@@ -1459,7 +1459,9 @@
         }
       },
       "required": [
-        "backendAddressPool"
+        "backendAddressPool",
+        "frontendIPConfigurations",
+        "protocol"
       ],
       "description": "Outbound pool of the load balancer."
     },