diff --git a/readme.md b/readme.md
index 08b0c74..cd3450f 100644
--- a/readme.md
+++ b/readme.md
@@ -76,10 +76,10 @@ console.log(arity); // 2
 A function which takes a function as an argument and/or returns a function.
 
 ```js
-const filter = (pred, xs) => {
+const filter = (predicate, xs) => {
     const result = [];
     for (let idx = 0; idx < xs.length; idx++) {
-        if (pred(xs[idx])) {
+        if (predicate(xs[idx])) {
             result.push(xs[idx]);
         }
     }