diff --git a/app/controllers/personal_projects_controller.rb b/app/controllers/personal_projects_controller.rb
index 843dbd4..ed546c1 100644
--- a/app/controllers/personal_projects_controller.rb
+++ b/app/controllers/personal_projects_controller.rb
@@ -23,7 +23,7 @@ class PersonalProjectsController < ApplicationController
       projects_temp = Project.where(:is_hidden=>false).sort_by{ |tp| [-tp[:year].to_i,-tp[:publication_date].to_i] }
       case params[:selectbox]
       when "project_type"
-          projects_show = projects_temp.select {|value| search_all_words(value.send("project_type").title.to_s, params[:keywords])}
+          projects_show = projects_temp.select {|value| search_all_words((value.send("project_type").title rescue ""), params[:keywords])}
       when "project_title","default"
           projects_show = projects_temp.select {|value| search_all_words(value.send("project_title").to_s, params[:keywords])}
       when "period"