diff --git a/app/models/budget.rb b/app/models/budget.rb
index 28fb8c5ca..ae589302f 100644
--- a/app/models/budget.rb
+++ b/app/models/budget.rb
@@ -6,6 +6,18 @@ class Budget < ActiveRecord::Base
   translates :name, touch: true
   include Globalizable
 
+  class Translation
+    validate :name_uniqueness_by_budget
+
+    def name_uniqueness_by_budget
+      if Budget.joins(:translations)
+               .where(name: name)
+               .where.not("budget_translations.budget_id": budget_id).any?
+        errors.add(:name, I18n.t("errors.messages.taken"))
+      end
+    end
+  end
+
   CURRENCY_SYMBOLS = %w(€ $ £ ¥).freeze
 
   before_validation :assign_model_to_translations
diff --git a/app/models/budget/translation.rb b/app/models/budget/translation.rb
deleted file mode 100644
index 1f3d93ea1..000000000
--- a/app/models/budget/translation.rb
+++ /dev/null
@@ -1,11 +0,0 @@
-class Budget::Translation < Globalize::ActiveRecord::Translation
-  validate :name_uniqueness_by_budget
-
-  def name_uniqueness_by_budget
-    if Budget.joins(:translations)
-             .where(name: name)
-             .where.not("budget_translations.budget_id": budget_id).any?
-      errors.add(:name, I18n.t("errors.messages.taken"))
-    end
-  end
-end