diff --git a/css/properties.json b/css/properties.json
index ebba0bdf..4c1f9ffa 100644
--- a/css/properties.json
+++ b/css/properties.json
@@ -10105,7 +10105,7 @@
     "mdn_url": "https://developer.mozilla.org/docs/Web/CSS/text-size-adjust"
   },
   "text-spacing-trim": {
-    "syntax": "space-all | normal | space-first | trim-start | trim-both | trim-all | auto",
+    "syntax": "space-all | normal | space-first | trim-start",
     "media": "visual",
     "inherited": true,
     "animationType": "discrete",