diff --git a/css/properties.json b/css/properties.json
index 48d84e5c..e102eb3b 100644
--- a/css/properties.json
+++ b/css/properties.json
@@ -3743,6 +3743,22 @@
     "status": "standard",
     "mdn_url": "https://developer.mozilla.org/docs/Web/CSS/border-right-width"
   },
+  "border-shape": {
+    "syntax": "none | [ <basic-shape> <geometry-box>?]{1,2}",
+    "media": "visual",
+    "inherited": false,
+    "animationType": "byComputedValueType",
+    "percentages": "no",
+    "groups": [
+      "CSS Logical Properties and Values"
+    ],
+    "initial": "none",
+    "appliesto": "allElements",
+    "computed": "asSpecified",
+    "order": "perGrammar",
+    "status": "standard",
+    "mdn_url": "https://developer.mozilla.org/docs/Web/CSS/border-shape"
+  },
   "border-spacing": {
     "syntax": "<length>{1,2}",
     "media": "visual",
diff --git a/css/syntaxes.json b/css/syntaxes.json
index b15c5a65..6a29dde0 100644
--- a/css/syntaxes.json
+++ b/css/syntaxes.json
@@ -87,7 +87,7 @@
     "syntax": "[ first | last ]? baseline"
   },
   "basic-shape": {
-    "syntax": "<inset()> | <xywh()> | <rect()> | <circle()> | <ellipse()> | <polygon()> | <path()>"
+    "syntax": "<inset()> | <xywh()> | <rect()> | <circle()> | <ellipse()> | <polygon()> | <path()> | shape()"
   },
   "basic-shape-rect": {
     "syntax": "<inset()> | <rect()> | <xywh()>"