1 files changed, 5 insertions, 2 deletions
diff --git a/activerecord/lib/active_record/associations/alias_tracker.rb b/activerecord/lib/active_record/associations/alias_tracker.rb
index 3963008a76..4a5c821607 100644
--- a/activerecord/lib/active_record/associations/alias_tracker.rb
+++ b/activerecord/lib/active_record/associations/alias_tracker.rb
@@ -4,8 +4,6 @@ module ActiveRecord
   module Associations
     # Keeps track of table aliases for ActiveRecord::Associations::JoinDependency
     class AliasTracker # :nodoc:
-      attr_reader :aliases
-
       def self.create(connection, initial_table, type_caster)
         aliases = Hash.new(0)
         aliases[initial_table] = 1
@@ -80,6 +78,11 @@ module ActiveRecord
         end
       end
 
+      # TODO Change this to private once we've dropped Ruby 2.2 support.
+      # Workaround for Ruby 2.2 "private attribute?" warning.
+      protected
+        attr_reader :aliases
+
       private
 
         def truncate(name)