diff --git a/readme.md b/readme.md
index 8d3e3526d..938fa3ee4 100644
--- a/readme.md
+++ b/readme.md
@@ -584,7 +584,7 @@ Assert that `value` is deep equal to `expected`.
 
 Assert that `value` is not deep equal to `expected`.
 
-### .throws(function|promise, error, [message])
+### .throws(function|promise, [error, [message]])
 
 Assert that `function` throws an error or `promise` rejects.