diff --git a/index.js b/index.js
index 9c3d07d..12128b9 100644
--- a/index.js
+++ b/index.js
@@ -233,7 +233,7 @@ function decode (str) {
 /**
  * URL-encode value.
  *
- * @param {string} str
+ * @param {string} val
  * @returns {string}
  */