diff --git a/lib/plugins/acts_as_watchable/lib/acts_as_watchable.rb b/lib/plugins/acts_as_watchable/lib/acts_as_watchable.rb
index c8ba2d199..e8f4dd32f 100644
--- a/lib/plugins/acts_as_watchable/lib/acts_as_watchable.rb
+++ b/lib/plugins/acts_as_watchable/lib/acts_as_watchable.rb
@@ -51,15 +51,6 @@ module Redmine
           base.extend ClassMethods
         end
 
-        # Returns an array of users that are proposed as watchers
-        def addable_watcher_users
-          users = self.project.principals.assignable_watchers.sort - self.watcher_users
-          if respond_to?(:visible?)
-            users.reject! {|user| user.is_a?(User) && !visible?(user)}
-          end
-          users
-        end
-
         # array of watchers that the given user is allowed to see
         def visible_watcher_users(user = User.current)
           if user.allowed_to?(:"view_#{self.class.name.underscore}_watchers", project)
diff --git a/test/unit/watcher_test.rb b/test/unit/watcher_test.rb
index 1fd853f31..a63810c57 100644
--- a/test/unit/watcher_test.rb
+++ b/test/unit/watcher_test.rb
@@ -110,14 +110,6 @@ class WatcherTest < ActiveSupport::TestCase
     assert_equal 2, issue.watchers.count
   end
 
-  def test_addable_watcher_users
-    addable_watcher_users = @issue.addable_watcher_users
-    assert_kind_of Array, addable_watcher_users
-    addable_watcher_users.each do |addable_watcher|
-      assert_equal true, addable_watcher.is_a?(User) || addable_watcher.is_a?(Group)
-    end
-  end
-
   def test_add_watcher_with_unsaved_object
     issue = Issue.new(project: Project.find(1), tracker_id: 1, subject: "test", author: User.find(2))
     assert_not issue.persisted?
@@ -155,11 +147,6 @@ class WatcherTest < ActiveSupport::TestCase
     assert 0, Watcher.where(watchable: issue).count
   end
 
-  def test_addable_watcher_users_should_not_include_user_that_cannot_view_the_object
-    issue = Issue.new(:project => Project.find(1), :is_private => true)
-    assert_nil issue.addable_watcher_users.detect {|user| user.is_a?(User) && !issue.visible?(user)}
-  end
-
   def test_any_watched_should_return_false_if_no_object_is_watched
     objects = (0..2).map {Issue.generate!}