diff --git a/98.md b/98.md
index 1ccd2611..ecbebc08 100644
--- a/98.md
+++ b/98.md
@@ -46,7 +46,7 @@ Example event:
 Servers MUST perform the following checks in order to validate the event:
 1. The `kind` MUST be `27235`.
 2. The `created_at` MUST be within a reasonable time window (suggestion 60 seconds).
-3. The `url` tag MUST be exactly the same as the absolute request URL (including query parameters).
+3. The `u` tag MUST be exactly the same as the absolute request URL (including query parameters).
 4. The `method` tag MUST be the same HTTP method used for the requested resource.
 
 When the request contains a body (as in POST/PUT/PATCH methods) clients SHOULD include a SHA256 hash of the request body in a `payload` tag as hex (`["payload", "<sha256-hex>"]`), servers MAY check this to validate that the requested payload is authorized.