diff --git a/docs/ApiValidationRules.md b/docs/ApiValidationRules.md
index 3899115..cffec3d 100644
--- a/docs/ApiValidationRules.md
+++ b/docs/ApiValidationRules.md
@@ -66,7 +66,12 @@ If a validation rule fails the call should return 400 (Bad request) including an
 ```json
 {
     "message" : "reason why this call failed",
-    "errors" : [ "specific error 1", "specific error 2", ...]
+    "errors" : [ {"error_message" : "first error message",
+                   "error_description" : "first error description"},
+                 {"error_message" : "second error message",
+                  "error_description":"second error description"},
+                   ... ...
+               ],
     "valid_data" : {
         "key1" : "value 1",
         "key2" : "value 2"