diff --git a/README.md b/README.md
index 15d8d7c7..6bfede08 100644
--- a/README.md
+++ b/README.md
@@ -213,7 +213,7 @@ When mangling is enabled but you want to prevent certain names from being
 mangled, you can declare those names with `--mangle reserved` — pass a
 comma-separated list of names.  For example:
 
-    uglifyjs ... -m reserved=[$,require,exports]
+    uglifyjs ... -m reserved=['$','require','exports']
 
 to prevent the `require`, `exports` and `$` names from being changed.