1 files changed, 2 insertions, 2 deletions
diff --git a/lib/arel/session.rb b/lib/arel/session.rb
index d844cd7423..c7fcc53a3b 100644
--- a/lib/arel/session.rb
+++ b/lib/arel/session.rb
@@ -11,13 +11,13 @@ module Arel
           begin
             @started = true
             @instance = manufacture
-            metaclass.class_eval do
+            singleton_class.class_eval do
               undef :new
               alias_method :new, :instance
             end
             yield
           ensure
-            metaclass.class_eval do
+            singleton_class.class_eval do
               undef :new
               alias_method :new, :manufacture
             end