diff --git a/lib/standards/aria-attrs.js b/lib/standards/aria-attrs.js
index e24507910b..560e61ea4e 100644
--- a/lib/standards/aria-attrs.js
+++ b/lib/standards/aria-attrs.js
@@ -78,7 +78,7 @@ const ariaAttrs = {
     global: true
   },
   'aria-details': {
-    type: 'idref',
+    type: 'idrefs',
     prop: 'ariaDetailsElements',
     allowEmpty: true,
     global: true
@@ -94,7 +94,7 @@ const ariaAttrs = {
     global: true
   },
   'aria-errormessage': {
-    type: 'idref',
+    type: 'idrefs',
     prop: 'ariaErrorMessageElements',
     allowEmpty: true,
     global: true