diff --git a/css/functions.json b/css/functions.json
index fa4a71c6..0e5b049d 100644
--- a/css/functions.json
+++ b/css/functions.json
@@ -464,7 +464,7 @@
     "mdn_url": "https://developer.mozilla.org/docs/Web/CSS/font-palette/palette-mix"
   },
   "path()": {
-    "syntax": "path( [ <fill-rule>, ]? <string> )",
+    "syntax": "path( <'fill-rule'>? , <string> )",
     "groups": [
       "CSS Shapes",
       "CSS Motion Path"
@@ -481,7 +481,7 @@
     "mdn_url": "https://developer.mozilla.org/docs/Web/CSS/transform-function/perspective"
   },
   "polygon()": {
-    "syntax": "polygon( <fill-rule>? , [ <length-percentage> <length-percentage> ]# )",
+    "syntax": "polygon( <'fill-rule'>? , [ <length-percentage> <length-percentage> ]# )",
     "groups": [
       "CSS Shapes"
     ],
diff --git a/css/syntaxes.json b/css/syntaxes.json
index 965edc64..7520bf2f 100644
--- a/css/syntaxes.json
+++ b/css/syntaxes.json
@@ -329,9 +329,6 @@
   "feature-value-name": {
     "syntax": "<custom-ident>"
   },
-  "fill-rule": {
-    "syntax": "nonzero | evenodd"
-  },
   "filter-function": {
     "syntax": "<blur()> | <brightness()> | <contrast()> | <drop-shadow()> | <grayscale()> | <hue-rotate()> | <invert()> | <opacity()> | <saturate()> | <sepia()>"
   },
@@ -663,7 +660,7 @@
     "syntax": "palette-mix(<color-interpolation-method> , [ [normal | light | dark | <palette-identifier> | <palette-mix()> ] && <percentage [0,100]>? ]#{2})"
   },
   "path()": {
-    "syntax": "path( [ <fill-rule>, ]? <string> )"
+    "syntax": "path( <'fill-rule'>? , <string> )"
   },
   "perspective()": {
     "syntax": "perspective( [ <length [0,∞]> | none ] )"
@@ -672,7 +669,7 @@
     "syntax": "hsl | hwb | lch | oklch"
   },
   "polygon()": {
-    "syntax": "polygon( <fill-rule>? , [ <length-percentage> <length-percentage> ]# )"
+    "syntax": "polygon( <'fill-rule'>? , [ <length-percentage> <length-percentage> ]# )"
   },
   "position": {
     "syntax": "[ [ left | center | right ] || [ top | center | bottom ] | [ left | center | right | <length-percentage> ] [ top | center | bottom | <length-percentage> ]? | [ [ left | right ] <length-percentage> ] && [ [ top | bottom ] <length-percentage> ] ]"