diff --git a/app/models/note.rb b/app/models/note.rb
index 8284da8616ff5cb40c78eca967860ff1640f00c5..0a9c65527813e4b453d8094582ce776dab35c9bb 100644
--- a/app/models/note.rb
+++ b/app/models/note.rb
@@ -68,6 +68,18 @@ class Note < ActiveRecord::Base
     }, without_protection: true)
   end
 
+  def self.create_assignee_change_note(noteable, project, author, assignee, source)
+    body = "_Reassigned to @#{assignee.username}_"
+
+    create({
+      noteable: noteable,
+      project: project,
+      author: author,
+      note: body,
+      system: true
+    }, without_protection: true)
+  end
+
   # +noteable+ was referenced from +mentioner+, by including GFM in either +mentioner+'s description or an associated Note.
   # Create a system Note associated with +noteable+ with a GFM back-reference to +mentioner+.
   def self.create_cross_reference_note(noteable, mentioner, author, project)
diff --git a/app/observers/issue_observer.rb b/app/observers/issue_observer.rb
index b150e39e239b70503c7e3fa68e2a20a15524fc24..77a99388842341957b12d7c1777d406edbe7c152 100644
--- a/app/observers/issue_observer.rb
+++ b/app/observers/issue_observer.rb
@@ -18,6 +18,7 @@ class IssueObserver < BaseObserver
   def after_update(issue)
     if issue.is_being_reassigned?
       notification.reassigned_issue(issue, current_user)
+      Note.create_assignee_change_note(issue, issue.project, current_user, issue.assignee, current_commit)
     end
 
     issue.notice_added_references(issue.project, current_user)