diff --git a/specification/keyvault/Security.KeyVault.Administration/client.tsp b/specification/keyvault/Security.KeyVault.Administration/client.tsp
index 1436bd827d6f..b8715032b3b7 100644
--- a/specification/keyvault/Security.KeyVault.Administration/client.tsp
+++ b/specification/keyvault/Security.KeyVault.Administration/client.tsp
@@ -19,3 +19,9 @@ namespace ClientCustomizations;
 @@clientName(KeyVault.Setting.type, "SettingType", "csharp");
 @@clientName(KeyVault.Setting.value, "Content", "csharp");
 @@access(KeyVault, Access.internal, "csharp");
+
+// JavaScript customizations
+@@clientName(KeyVault.FullBackupOperation.azureStorageBlobContainerUri,
+  "folderUri",
+  "javascript"
+);