diff --git a/app/controllers/watchers_controller.rb b/app/controllers/watchers_controller.rb
index 06e5802..ad8d8be 100644
--- a/app/controllers/watchers_controller.rb
+++ b/app/controllers/watchers_controller.rb
@@ -83,7 +83,7 @@ private
         replace_ids = [params[:replace]]
       end
     else
-      replace_ids = 'watcher'
+      replace_ids = ['watcher']
     end
     respond_to do |format|
       format.html { redirect_to :back }