diff --git a/lib/ransack.rb b/lib/ransack.rb
index f47013e..6e2e848 100644
--- a/lib/ransack.rb
+++ b/lib/ransack.rb
@@ -14,7 +14,7 @@ Ransack.configure do |config|
     config.add_predicate name, :arel_predicate => name
   end
   Ransack::Constants::DERIVED_PREDICATES.each do |args|
-    config.add_predicate *args
+    config.add_predicate(*args)
   end
 end