diff --git a/app/controllers/admin/journal_papers_controller.rb b/app/controllers/admin/journal_papers_controller.rb
index d878883..dcad123 100644
--- a/app/controllers/admin/journal_papers_controller.rb
+++ b/app/controllers/admin/journal_papers_controller.rb
@@ -28,7 +28,7 @@ class Admin::JournalPapersController < OrbitMemberController
   def merge
     @journals=JournalPaper.order_by(:year=>'desc').map{|value| value}.group_by{|v| [v[:paper_title],v[:journal_title]]}
     @journals.each do |key,value|
-      if value.length==1
+      if value.length<=1
         @journals.delete key
       end
     end