1 files changed, 2 insertions, 5 deletions
diff --git a/activerecord/lib/active_record/base.rb b/activerecord/lib/active_record/base.rb
index b0ff70e5af..4c51d3f3ee 100755
--- a/activerecord/lib/active_record/base.rb
+++ b/activerecord/lib/active_record/base.rb
@@ -816,7 +816,7 @@ module ActiveRecord #:nodoc:
       end
 
       def descends_from_active_record? # :nodoc:
-        superclass.abstract_class? || !columns_hash.include?(inheritance_column)
+        superclass == Base || !columns_hash.include?(inheritance_column)
       end
 
 
@@ -1360,7 +1360,7 @@ module ActiveRecord #:nodoc:
 
         # Returns the class descending directly from ActiveRecord in the inheritance hierarchy.
         def class_of_active_record_descendant(klass)
-          if klass.superclass.abstract_class?
+          if klass.superclass == Base || klass.superclass.abstract_class?
             klass
           elsif klass.superclass.nil?
             raise ActiveRecordError, "#{name} doesn't belong in a hierarchy descending from ActiveRecord"
@@ -1481,9 +1481,6 @@ module ActiveRecord #:nodoc:
         end
     end
 
-    # ActiveRecord::Base is abstract.
-    self.abstract_class = true
-
     public
       # New objects can be instantiated as either empty (pass no construction parameter) or pre-set with
       # attributes but not yet saved (pass a hash with key names matching the associated table column names).