diff --git a/lib/json_api_client/query/builder.rb b/lib/json_api_client/query/builder.rb
index <HASH>..<HASH> 100644
--- a/lib/json_api_client/query/builder.rb
+++ b/lib/json_api_client/query/builder.rb
@@ -121,11 +121,11 @@ module JsonApiClient
           case arg
           when Hash
             arg.map do |k, v|
-              operator = (v == :desc ? "-" : "+")
+              operator = (v == :desc ? "-" : "")
               "#{operator}#{k}"
             end
           else
-            "+#{arg}"
+            "#{arg}"
           end
         end.flatten
       end
removing "+" prefix from sort requests per JSON API spec