diff --git a/putfdmvalidate.json b/putfdmvalidate.json
index a3cd4ced47ceefd298bf3a914bc237ee49b1eb5c..03b360448b256b44f52445262e73ef368dd1968a 100644
--- a/putfdmvalidate.json
+++ b/putfdmvalidate.json
@@ -44,7 +44,8 @@
     "putfdmvalidate##data##attributes" : {
       "properties" : {
         "errors" : {
-          "type" : "array"
+          "type" : "array",
+          "items" : {}
         },
         "valid" : {
           "type" : "boolean"