diff --git a/config/locales/en.yml b/config/locales/en.yml
index 60e29711e7..4bd159557a 100644
--- a/config/locales/en.yml
+++ b/config/locales/en.yml
@@ -80,6 +80,8 @@ en:
       variant_override:
         count_on_hand: "On Hand"
     errors:
+      messages:
+        calculator_preferred_value_error: "Invalid input. Please use only numbers. For example: 10, 5.5, -20"
       models:
         spree/user:
           attributes: