diff --git a/lib/closure_tree/numeric_order_support.rb b/lib/closure_tree/numeric_order_support.rb
index faeec05..0e53358 100644
--- a/lib/closure_tree/numeric_order_support.rb
+++ b/lib/closure_tree/numeric_order_support.rb
@@ -42,7 +42,7 @@ def reorder_with_parent_id(parent_id, minimum_sort_order_value = nil)
           UPDATE #{quoted_table_name}
           SET #{quoted_order_column(false)} = t.seq + #{minimum_sort_order_value.to_i - 1}
           FROM (
-            SELECT #{quoted_id_column_name} AS id, row_number() OVER(ORDER BY #{order_by}) AS seq
+            SELECT #{quoted_id_column_name} AS id, row_number() OVER(ORDER BY #{fully_qualified_order_by}) AS seq
             FROM #{quoted_table_name}
             WHERE #{where_eq(parent_column_name, parent_id)} #{min_where}
           ) AS t
diff --git a/lib/closure_tree/support.rb b/lib/closure_tree/support.rb
index 3101388..9d498da 100644
--- a/lib/closure_tree/support.rb
+++ b/lib/closure_tree/support.rb
@@ -66,14 +66,14 @@ def hierarchy_table_name
 
     def with_order_option(opts)
       if order_option?
-        opts[:order] = [opts[:order], order_by].compact.join(",")
+        opts[:order] = [opts[:order], fully_qualified_order_by].compact.join(",")
       end
       opts
     end
 
     def scope_with_order(scope, additional_order_by = nil)
       if order_option?
-        scope.order(*([additional_order_by, order_by].compact))
+        scope.order(*([additional_order_by, fully_qualified_order_by].compact))
       else
         additional_order_by ? scope.order(additional_order_by) : scope
       end
@@ -85,7 +85,7 @@ def has_many_order_without_option(order_by_opt)
     end
 
     def has_many_order_with_option(order_by_opt=nil)
-      order_options = [order_by_opt, order_by].compact
+      order_options = [order_by_opt, fully_qualified_order_by].compact
       [lambda {
         order_options = order_options.map { |o| o.is_a?(Proc) ? o.call : o }
         order(order_options)
diff --git a/lib/closure_tree/support_attributes.rb b/lib/closure_tree/support_attributes.rb
index 38879ad..8c6ddc8 100644
--- a/lib/closure_tree/support_attributes.rb
+++ b/lib/closure_tree/support_attributes.rb
@@ -115,6 +115,10 @@ def quoted_order_column(include_table_name = true)
       "#{prefix}#{connection.quote_column_name(order_column)}"
     end
 
+    def fully_qualified_order_by
+      "#{quoted_order_column} #{order_by_order}"
+    end
+
     # table_name alias keyword , like "AS". When used on table name alias, Oracle Database don't support used 'AS'
     def t_alias_keyword
       (ActiveRecord::Base.connection.adapter_name.to_sym == :OracleEnhanced) ? "" : "AS"