diff --git a/css/functions.json b/css/functions.json
index 527d33ad..8cf8b2d5 100644
--- a/css/functions.json
+++ b/css/functions.json
@@ -141,12 +141,12 @@
     "mdn_url": "https://developer.mozilla.org/docs/Web/CSS/env"
   },
   "fit-content()": {
-    "syntax": "fit-content( [ <length> | <percentage> ] )",
+    "syntax": "fit-content( <length-percentage [0,∞]> )",
     "groups": [
       "CSS Box Model"
     ],
     "status": "standard",
-    "mdn_url": "https://developer.mozilla.org/docs/Web/CSS/fit-content"
+    "mdn_url": "https://developer.mozilla.org/docs/Web/CSS/fit-content_function"
   },
   "grayscale()": {
     "syntax": "grayscale( <number-percentage> )",