diff --git a/doc/content.adoc b/doc/content.adoc
index 2f51d44..4713197 100644
--- a/doc/content.adoc
+++ b/doc/content.adoc
@@ -264,6 +264,7 @@ This is the table with available builtin validators:
 Additional notes:
 
 * `number-str` coerces to `java.lang.Double` or `float` (cljs)
+* `integer-str` coerces to `java.lang.Long` or `Number` (cljs). Note that `integer-str` just checks if the given string is numeric and coerces it to a integer. For example, "100.001" passes the validation and is coerced to 10.
 * `boolean-str` coerces to `true` (`"t"`, `"true"`, `"1"`) or `false` (`"f"`, `"false"`, `"0"`).
 * `string-str` coerces anything to string using `str` function.