diff --git a/schemas/2022-08-01/Microsoft.Media.json b/schemas/2022-08-01/Microsoft.Media.json
index 7666c0bd18..ee99610324 100644
--- a/schemas/2022-08-01/Microsoft.Media.json
+++ b/schemas/2022-08-01/Microsoft.Media.json
@@ -916,7 +916,7 @@
               "$ref": "https://schema.management.azure.com/schemas/common/definitions.json#/definitions/expression"
             }
           ],
-          "description": "The key that must be used as FairPlay Application Secret key."
+          "description": "The key that must be used as FairPlay Application Secret key. This needs to be base64 encoded."
         },
         "fairPlayPfx": {
           "type": "string",