diff --git a/specification/frontdoor/resource-manager/Microsoft.Network/stable/2019-03-01/webapplicationfirewall.json b/specification/frontdoor/resource-manager/Microsoft.Network/stable/2019-03-01/webapplicationfirewall.json
index 7c687789c1ea..a49a01a2f97a 100644
--- a/specification/frontdoor/resource-manager/Microsoft.Network/stable/2019-03-01/webapplicationfirewall.json
+++ b/specification/frontdoor/resource-manager/Microsoft.Network/stable/2019-03-01/webapplicationfirewall.json
@@ -497,7 +497,8 @@
             "RequestUri",
             "RequestHeader",
             "RequestBody",
-            "Cookies"
+            "Cookies",
+            "SocketAddr"
           ],
           "x-ms-enum": {
             "name": "MatchVariable",