diff --git a/activerecord/lib/active_record/reflection.rb b/activerecord/lib/active_record/reflection.rb
index 6b28bcb..921a360 100644
--- a/activerecord/lib/active_record/reflection.rb
+++ b/activerecord/lib/active_record/reflection.rb
@@ -301,8 +301,7 @@ module ActiveRecord
         dependent_conditions = []
         dependent_conditions << "#{primary_key_name} = #{record.send(name).send(:owner_quoted_id)}"
         dependent_conditions << "#{options[:as]}_type = '#{base_class.name}'" if options[:as]
-        dependent_conditions << klass.send(:sanitize_sql, options[:conditions]) if options[:conditions]
-        dependent_conditions << extra_conditions if extra_conditions
+        dependent_conditions << record.send(:interpolate_sql, klass.send(:sanitize_sql, options[:conditions])) if options[:conditions]
         dependent_conditions = dependent_conditions.collect {|where| "(#{where})" }.join(" AND ")
         dependent_conditions = dependent_conditions.gsub('@', '\@')
         dependent_conditions
diff --git a/activerecord/test/models/company.rb b/activerecord/test/models/company.rb
index be6dd71..0b0f4e4 100644
--- a/activerecord/test/models/company.rb
+++ b/activerecord/test/models/company.rb
@@ -47,7 +47,7 @@ class Firm < Company
   has_many :exclusively_dependent_clients_of_firm, :foreign_key => "client_of", :class_name => "Client", :order => "id", :dependent => :delete_all
   has_many :limited_clients, :class_name => "Client", :limit => 1
   has_many :clients_like_ms, :conditions => "name = 'Microsoft'", :class_name => "Client", :order => "id"
-  has_many :clients_with_interpolated_conditions, :class_name => "Client", :conditions => 'rating > #{rating}'
+  has_many :clients_with_interpolated_conditions, :class_name => "Client", :conditions => 'rating > #{rating}', :dependent => :delete_all
   has_many :clients_like_ms_with_hash_conditions, :conditions => { :name => 'Microsoft' }, :class_name => "Client", :order => "id"
   has_many :clients_using_sql, :class_name => "Client", :finder_sql => 'SELECT * FROM companies WHERE client_of = #{id}'
   has_many :clients_using_multiline_sql, :class_name => "Client", :finder_sql => '