diff --git a/css/functions.json b/css/functions.json
index 3373b27b..06a4b8e0 100644
--- a/css/functions.json
+++ b/css/functions.json
@@ -732,6 +732,14 @@
     "status": "standard",
     "mdn_url": "https://developer.mozilla.org/docs/Web/CSS/sqrt"
   },
+  "symbols()": {
+    "syntax": "symbols( <symbols-type>? [ <string> | <image> ]+ )",
+    "groups": [
+      "CSS Counter Styles"
+    ],
+    "status": "standard",
+    "mdn_url": "https://developer.mozilla.org/docs/Web/CSS/symbols"
+  },
   "tan()": {
     "syntax": "tan( <calc-sum> )",
     "groups": [
diff --git a/css/syntaxes.json b/css/syntaxes.json
index 20e41cd8..89266694 100644
--- a/css/syntaxes.json
+++ b/css/syntaxes.json
@@ -914,6 +914,12 @@
   "symbol": {
     "syntax": "<string> | <image> | <custom-ident>"
   },
+  "symbols()": {
+    "syntax": "symbols( <symbols-type>? [ <string> | <image> ]+ )"
+  },
+  "symbols-type": {
+    "syntax": "cyclic | numeric | alphabetic | symbolic | fixed"
+  },
   "system-color": {
     "syntax": "AccentColor | AccentColorText | ActiveText | ButtonBorder | ButtonFace | ButtonText | Canvas | CanvasText | Field | FieldText | GrayText | Highlight | HighlightText | LinkText | Mark | MarkText | SelectedItem | SelectedItemText | VisitedText"
   },