diff --git a/css/at-rules/supports.json b/css/at-rules/supports.json
index 3820ba80b5f588..a2b55b9f113c13 100644
--- a/css/at-rules/supports.json
+++ b/css/at-rules/supports.json
@@ -46,6 +46,41 @@
             "deprecated": false
           }
         },
+        "at-rule": {
+          "__compat": {
+            "description": "`at-rule()`",
+            "spec_url": "https://drafts.csswg.org/css-conditional-5/#typedef-supports-at-rule-fn",
+            "tags": [
+              "web-features:supports"
+            ],
+            "support": {
+              "chrome": {
+                "version_added": "148"
+              },
+              "chrome_android": "mirror",
+              "edge": "mirror",
+              "firefox": {
+                "version_added": false
+              },
+              "firefox_android": "mirror",
+              "oculus": "mirror",
+              "opera": "mirror",
+              "opera_android": "mirror",
+              "safari": {
+                "version_added": false
+              },
+              "safari_ios": "mirror",
+              "samsunginternet_android": "mirror",
+              "webview_android": "mirror",
+              "webview_ios": "mirror"
+            },
+            "status": {
+              "experimental": true,
+              "standard_track": true,
+              "deprecated": false
+            }
+          }
+        },
         "font-format": {
           "__compat": {
             "description": "`font-format()`",