diff --git a/src/js/parser/javascript/any_character.js b/src/js/parser/javascript/any_character.js
index 8ee6376..707947b 100644
--- a/src/js/parser/javascript/any_character.js
+++ b/src/js/parser/javascript/any_character.js
@@ -1,3 +1,6 @@
+// AnyCharacter nodes are for `*` regular expression syntax. They are rendered
+// as just an "any character" label.
+
 import _ from 'lodash';
 
 export default {