diff --git a/readme.md b/readme.md
index 733d94e..b37e053 100644
--- a/readme.md
+++ b/readme.md
@@ -2,6 +2,8 @@
 
 > Check if a value is a function
 
+In Node.js, just use `typeof fn` which works exactly the same. This module can be useful in the browser where `typeof fn` has a myriad of [bugs](https://github.com/lodash/lodash/blob/8f621b38bfc67f64a9bf7af347e3398477790a39/lodash.js#L8171-L8173).
+
 
 ## Install