diff --git a/activerecord/lib/active_record/locking/optimistic.rb b/activerecord/lib/active_record/locking/optimistic.rb
index bb28444b07..f66458cc8c 100644
--- a/activerecord/lib/active_record/locking/optimistic.rb
+++ b/activerecord/lib/active_record/locking/optimistic.rb
@@ -116,7 +116,6 @@ module ActiveRecord
       lock_col = self.class.locking_column
       previous_value = send(lock_col).to_i
 
-      table = Arel(self.class.table_name)
       affected_rows = table.where(
           table[self.class.primary_key].eq(quoted_id).and(
           table[self.class.locking_column].eq(quote_value(previous_value))