1 files changed, 1 insertions, 1 deletions
diff --git a/activerecord/lib/active_record/associations/builder/belongs_to.rb b/activerecord/lib/active_record/associations/builder/belongs_to.rb
index 47cc1f4b34..3998aca23e 100644
--- a/activerecord/lib/active_record/associations/builder/belongs_to.rb
+++ b/activerecord/lib/active_record/associations/builder/belongs_to.rb
@@ -103,7 +103,7 @@ module ActiveRecord::Associations::Builder
         BelongsTo.touch_record(record, foreign_key, n, touch)
       }
 
-      model.after_save    callback
+      model.after_save    callback, if: :changed?
       model.after_touch   callback
       model.after_destroy callback
     end