1 files changed, 1 insertions, 1 deletions
diff --git a/activesupport/lib/active_support/core_ext/object/instance_variables.rb b/activesupport/lib/active_support/core_ext/object/instance_variables.rb
index 9f1d4ed2aa..4ecaab3bbb 100644
--- a/activesupport/lib/active_support/core_ext/object/instance_variables.rb
+++ b/activesupport/lib/active_support/core_ext/object/instance_variables.rb
@@ -35,7 +35,7 @@ class Object
   #   C.new(0, 1).instance_variable_names # => ["@y", "@x"]
   if RUBY_VERSION >= '1.9'
     def instance_variable_names
-      instance_variables.map(&:to_s)
+      instance_variables.map { |var| var.to_s }
     end
   else
     alias_method :instance_variable_names, :instance_variables