diff --git a/index.js b/index.js
index 467a478..2b53c70 100644
--- a/index.js
+++ b/index.js
@@ -31,7 +31,6 @@ module.exports = {
     "declaration-property-value-blacklist": {
       "/^transition/": ["/all/"]
     },
-    "function-calc-no-invalid": true,
     "function-comma-space-after": "always-single-line",
     "function-comma-space-before": "never",
     "function-parentheses-space-inside": "never-single-line",