diff --git a/modules/costs/app/controllers/cost_types_controller.rb b/modules/costs/app/controllers/cost_types_controller.rb
index bacf91306b..bbd09e3f35 100644
--- a/modules/costs/app/controllers/cost_types_controller.rb
+++ b/modules/costs/app/controllers/cost_types_controller.rb
@@ -129,7 +129,7 @@ class CostTypesController < ApplicationController
       cr.valid_from = today
     end
 
-    rate.rate = parse_number_string_to_number(params[:rate])
+    rate.rate = CostRate.parse_number_string_to_number(params[:rate])
     if rate.save
       flash[:notice] = t(:notice_successful_update)
       redirect_to action: 'index'