diff --git a/lib/commons/aria/index.js b/lib/commons/aria/index.js
index 3a67810fe3..6d3fa943ea 100644
--- a/lib/commons/aria/index.js
+++ b/lib/commons/aria/index.js
@@ -60,8 +60,8 @@ lookupTables.attributes = {
 		values: ['true', 'false', 'undefined']
 	},
 	'aria-haspopup': {
-		type: 'boolean',
-		values: ['true', 'false']
+		type: 'nmtoken',
+		values: ['true', 'false', 'menu', 'listbox', 'tree', 'grid', 'dialog']
 	},
 	'aria-hidden': {
 		type: 'boolean',