diff --git a/controllers/mpog_software_plugin_myprofile_controller.rb b/controllers/mpog_software_plugin_myprofile_controller.rb
index 52468bc..f4aafd3 100644
--- a/controllers/mpog_software_plugin_myprofile_controller.rb
+++ b/controllers/mpog_software_plugin_myprofile_controller.rb
@@ -56,9 +56,9 @@ class MpogSoftwarePluginMyprofileController < MyProfileController
     valid_database = DatabaseHelper.valid_list_database?(@list_databases)
     valid_language = SoftwareLanguageHelper.valid_list_language?(@list_languages)
     valid_operating_system = OperatingSystemHelper.valid_list_operating_system?(@list_operating_systems)
+    valid_software_categories = request.post? && @software_categories.valid?
 
-    if valid_software_info && valid_community && valid_libraries && valid_license && valid_language && valid_database && valid_operating_system
-
+    if valid_software_info && valid_community && valid_libraries && valid_license && valid_language && valid_database && valid_operating_system && valid_software_categories
       @community = Community.create_after_moderation(user, {:environment => environment}.merge(params[:community]), @software_info, @license_info, @software_categories)
 
       unless params[:q].nil?
@@ -87,9 +87,11 @@ class MpogSoftwarePluginMyprofileController < MyProfileController
       @list_operating_systems.each do |os|
         @errors |= os.errors.full_messages
       end
+
       @errors |= @community.errors.full_messages
       @errors |= @software_info.errors.full_messages
       @errors |= @license_info.errors.full_messages
+      @errors |= @software_categories.errors.full_messages
     end
   end
 
diff --git a/lib/software_categories.rb b/lib/software_categories.rb
index 2ced887..e7206f9 100644
--- a/lib/software_categories.rb
+++ b/lib/software_categories.rb
@@ -7,4 +7,19 @@ class SoftwareCategories < ActiveRecord::Base
                   :security_public_order , :work , :transportation , :urbanism
 
   belongs_to :software_info
+
+  validate :verify_blank_fields
+
+  def verify_blank_fields
+    ignore_list = ["id", "software_info_id"]
+
+    fields =  self.attribute_names - ignore_list
+
+    one_is_filled = false
+    fields.each do |field|
+      one_is_filled = true if self[field] == true
+    end
+
+    self.errors.add(:base, _("At last one category must be checked")) unless one_is_filled
+  end
 end
\ No newline at end of file
diff --git a/lib/software_info.rb b/lib/software_info.rb
index 18384bf..2082338 100644
--- a/lib/software_info.rb
+++ b/lib/software_info.rb
@@ -14,8 +14,6 @@ class SoftwareInfo < ActiveRecord::Base
 
   has_one :software_categories
 
-  validates :software_categories, :presence=>true
-
   validates :features, :objectives,
     :presence=>true,
     :length => {
--
libgit2 0.21.2