diff --git a/app/controllers/public/needs_controller.rb b/app/controllers/public/needs_controller.rb
index cf447e3..0c975ae 100644
--- a/app/controllers/public/needs_controller.rb
+++ b/app/controllers/public/needs_controller.rb
@@ -19,7 +19,7 @@ class Public::NeedsController < ApplicationController
       @needs = @needs.search(params[:q])
     end
 
-    if(params[:c] != '')
+    if(params[:c] and params[:c] != '')
       @category = NeedCategory.find(params[:c])
       ids =  @category.child_ids
       @needs = @needs.where(category_id: ids)