diff --git a/activerecord/lib/active_record/associations/has_many_through_association.rb b/activerecord/lib/active_record/associations/has_many_through_association.rb
index 281db8fe06..19112216aa 100644
--- a/activerecord/lib/active_record/associations/has_many_through_association.rb
+++ b/activerecord/lib/active_record/associations/has_many_through_association.rb
@@ -83,7 +83,7 @@ module ActiveRecord
             raise_on_type_mismatch(associate)
             raise ActiveRecord::HasManyThroughCantDissociateNewRecords.new(@owner, through) unless associate.respond_to?(:new_record?) && !associate.new_record?
 
-            @owner.send(through.name).proxy_target.delete(klass.delete_all(construct_join_attributes(associate)))
+            klass.delete_all(construct_join_attributes(associate))
             @target.delete(associate)
           end
         end
diff --git a/activerecord/test/cases/associations/join_model_test.rb b/activerecord/test/cases/associations/join_model_test.rb
index f59fe70654..e72c6d0e07 100644
--- a/activerecord/test/cases/associations/join_model_test.rb
+++ b/activerecord/test/cases/associations/join_model_test.rb
@@ -505,11 +505,13 @@ class AssociationsJoinModelTest < ActiveRecord::TestCase
     tag = Tag.create!(:name => 'doomed')
     post_thinking = posts(:thinking)
     post_thinking.tags << tag
+    assert_equal(count + 1, post_thinking.taggings(true).size)
     assert_equal(count + 1, post_thinking.tags(true).size)
 
     assert_nothing_raised { post_thinking.tags.delete(tag) }
     assert_equal(count, post_thinking.tags.size)
     assert_equal(count, post_thinking.tags(true).size)
+    assert_equal(count, post_thinking.taggings(true).size)
     assert_equal(tags_before.sort, post_thinking.tags.sort)
   end