diff --git a/README.md b/README.md
index e46aa017..f1c0cc5e 100644
--- a/README.md
+++ b/README.md
@@ -538,8 +538,8 @@ You can pass `--comments` to retain certain comments in the output.  By
 default it will keep JSDoc-style comments that contain "@preserve",
 "@license" or "@cc_on" (conditional compilation for IE).  You can pass
 `--comments all` to keep all the comments, or a valid JavaScript regexp to
-keep only comments that match this regexp.  For example `--comments
-'/foo|bar/'` will keep only comments that contain "foo" or "bar".
+keep only comments that match this regexp.  For example `--comments /^!/`
+will keep comments like `/*! Copyright Notice */`.
 
 Note, however, that there might be situations where comments are lost.  For
 example: