diff --git a/app/models/document_category.rb b/app/models/document_category.rb
index a7a2fd9..c22b81e 100644
--- a/app/models/document_category.rb
+++ b/app/models/document_category.rb
@@ -31,4 +31,12 @@ class DocumentCategory < Enumeration
   def transfer_relations(to)
     documents.update_all("category_id = #{to.id}")
   end
+
+  def self.default
+    d = super
+    if d.nil?
+      d = find(:first)
+    end
+    d
+  end
 end
diff --git a/test/unit/document_category_test.rb b/test/unit/document_category_test.rb
index d3d3978..30ef168 100644
--- a/test/unit/document_category_test.rb
+++ b/test/unit/document_category_test.rb
@@ -38,4 +38,8 @@ class DocumentCategoryTest < ActiveSupport::TestCase
     e.update_attributes(:is_default => true)
     assert_equal 3, DocumentCategory.default.id
   end
+
+  def test_force_default
+    assert_equal 1, DocumentCategory.default.id
+  end
 end