diff --git a/specification/network/resource-manager/Microsoft.Network/stable/2018-12-01/azureFirewall.json b/specification/network/resource-manager/Microsoft.Network/stable/2018-12-01/azureFirewall.json
index 8f2e6b532036..376d056c03b7 100644
--- a/specification/network/resource-manager/Microsoft.Network/stable/2018-12-01/azureFirewall.json
+++ b/specification/network/resource-manager/Microsoft.Network/stable/2018-12-01/azureFirewall.json
@@ -556,7 +556,7 @@
             },
             "destinationAddresses":{  
                "type":"array",
-               "description":"List of destination IP addresses for this rule.",
+               "description":"List of destination IP addresses for this rule. Supports IP ranges, prefixes, and service tags.",
                "items":{  
                   "type":"string"
                }