diff --git a/packages/redux-devtools-core/.eslintrc b/packages/redux-devtools-core/.eslintrc
index 90959cf7..92a77cff 100644
--- a/packages/redux-devtools-core/.eslintrc
+++ b/packages/redux-devtools-core/.eslintrc
@@ -11,6 +11,7 @@
     "react/jsx-uses-vars": 2,
     "react/react-in-jsx-scope": 2,
     "react/jsx-quotes": 0,
+    "arrow-parens": 0,
     "block-scoped-var": 0,
     "padded-blocks": 0,
     "quotes": [ 1, "single" ],
diff --git a/packages/redux-devtools-core/src/utils/filters.js b/packages/redux-devtools-core/src/utils/filters.js
index 814cc9c7..9f704c69 100644
--- a/packages/redux-devtools-core/src/utils/filters.js
+++ b/packages/redux-devtools-core/src/utils/filters.js
@@ -35,21 +35,21 @@ export function getLocalFilter(config) {
 }
 
 function getDevToolsOptions() {
-  return typeof window !== 'undefined' && window.devToolsOptions || {};
+  return (typeof window !== 'undefined' && window.devToolsOptions) || {};
 }
 
 export function isFiltered(action, localFilter) {
   const { type } = action.action || action;
   const opts = getDevToolsOptions();
   if (
-    !localFilter && (opts.filter && opts.filter === FilterState.DO_NOT_FILTER) ||
-    type && typeof type.match !== 'function'
+    (!localFilter && (opts.filter && opts.filter === FilterState.DO_NOT_FILTER)) ||
+    (type && typeof type.match !== 'function')
   ) return false;
 
   const { whitelist, blacklist } = localFilter || opts;
   return (
-    whitelist && !type.match(whitelist) ||
-    blacklist && type.match(blacklist)
+    (whitelist && !type.match(whitelist)) ||
+    (blacklist && type.match(blacklist))
   );
 }