diff --git a/src/subclass.js b/src/subclass.js
index dbee53e..9205d9e 100644
--- a/src/subclass.js
+++ b/src/subclass.js
@@ -7,6 +7,7 @@ const emulationGroupMarker = '$E$';
 
 /**
 @class
+@augments RegExp
 @param {string | RegExpSubclass} expression
 @param {string} [flags]
 @param {{useEmulationGroups: boolean;}} [options]