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 4bbba854a..2bddd64b7 100644
--- a/lib/plugins/acts_as_watchable/lib/acts_as_watchable.rb
+++ b/lib/plugins/acts_as_watchable/lib/acts_as_watchable.rb
@@ -20,7 +20,6 @@ module Redmine
             attr_protected :watcher_ids, :watcher_user_ids
           end
           send :include, Redmine::Acts::Watchable::InstanceMethods
-          alias_method_chain :watcher_user_ids=, :uniq_ids
         end
       end
 
@@ -59,11 +58,11 @@ module Redmine
         end
 
         # Overrides watcher_user_ids= to make user_ids uniq
-        def watcher_user_ids_with_uniq_ids=(user_ids)
+        def watcher_user_ids=(user_ids)
           if user_ids.is_a?(Array)
             user_ids = user_ids.uniq
           end
-          send :watcher_user_ids_without_uniq_ids=, user_ids
+          super user_ids
         end
 
         # Returns true if object is watched by +user+