diff --git a/lib/parse-variable.js b/lib/parse-variable.js
index ef2d614..72839f1 100644
--- a/lib/parse-variable.js
+++ b/lib/parse-variable.js
@@ -27,7 +27,12 @@ const findVars = (node, result, ignoreList) => {
     return;
   }
 
-  if (node instanceof Declaration && node.prop.startsWith('$') && !ignoreList.includes(node.prop) && fusvEnabled) {
+  if (
+    node instanceof Declaration &&
+    (node.prop.startsWith("$") || node.prop.startsWith("--")) &&
+    !ignoreList.includes(node.prop) &&
+    fusvEnabled
+  ) {
     result.push(new UnusedInfo(node));
     return;
   }