diff --git a/src/iplant_groups/routes/schemas/attribute.clj b/src/iplant_groups/routes/schemas/attribute.clj
index b0c6ab6..6322598 100644
--- a/src/iplant_groups/routes/schemas/attribute.clj
+++ b/src/iplant_groups/routes/schemas/attribute.clj
@@ -13,8 +13,8 @@
   (into {} (map (fn [[k v]] [(s/optional-key k) v]) AttributeDefinition)))
 
 (def AttributeDefinitionLookup
-  (s/conditional AttributeDefinitionLookupSchema
-                 (s/pred (some-fn :id :name) 'id-or-name-specified)))
+  (s/both AttributeDefinitionLookupSchema
+          (s/pred (some-fn :id :name) 'id-or-name-specified)))
 
 (s/defschema BaseAttributeName
   {:name