diff --git a/lib/axiom/relation/gateway.rb b/lib/axiom/relation/gateway.rb
index 7274cc3..27d0430 100644
--- a/lib/axiom/relation/gateway.rb
+++ b/lib/axiom/relation/gateway.rb
@@ -10,7 +10,7 @@ class Gateway < Relation
 
       # remove methods so they can be proxied
       undef_method(*DECORATED_CLASS.public_instance_methods(false).map(&:to_s) - %w[materialize])
-      undef_method(:project, :remove, :extend, :rename, :restrict, :sort_by, :reverse, :drop, :take)
+      undef_method(:project, :remove, :extend, :rename, :restrict, :sort, :sort_by, :reverse, :drop, :take)
 
       # The adapter the gateway will use to fetch results
       #