diff --git a/css/at-rules/viewport.json b/css/at-rules/viewport.json
index 5cbcbec4b3d20b..75b0cec1628bc3 100644
--- a/css/at-rules/viewport.json
+++ b/css/at-rules/viewport.json
@@ -5,10 +5,7 @@
         "__compat": {
           "description": "<code>@viewport</code>",
           "mdn_url": "https://developer.mozilla.org/docs/Web/CSS/@viewport",
-          "spec_url": [
-            "https://drafts.csswg.org/css-round-display/#extending-viewport-rule",
-            "https://drafts.csswg.org/css-device-adapt/#atviewport-rule"
-          ],
+          "spec_url": "https://drafts.csswg.org/css-device-adapt/#atviewport-rule",
           "support": {
             "chrome": {
               "version_removed": "84",