diff --git a/README.md b/README.md
index bd4e052c..c9032861 100644
--- a/README.md
+++ b/README.md
@@ -690,9 +690,9 @@ If you're using the `X-SourceMap` header instead, you can just omit `sourceMap.u
 - `eval` (default `false`). Pass `true` to mangle names visible in scopes
   where `eval` or `with` are used.
 
-- `safari10` (default `false`). Pass `true` to work around the 
-  Safari 10 loop scope [bug](https://bugs.webkit.org/show_bug.cgi?id=171041) 
-  for `let` and `const` variables.
+- `safari10` (default `false`). Pass `true` to work around the Safari 10 loop
+  iterator [bug](https://bugs.webkit.org/show_bug.cgi?id=171041) 
+  "Cannot declare a let variable twice".
 
 Examples: