diff --git a/lib/spree/localized_number.rb b/lib/spree/localized_number.rb
index 66d75e2b6b..a1ba18accd 100644
--- a/lib/spree/localized_number.rb
+++ b/lib/spree/localized_number.rb
@@ -44,6 +44,7 @@ module Spree
 
     def self.valid_localizable_number?(number)
       return true unless number.is_a?(String) || number.respond_to?(:to_d)
+      # Invalid if only two digits between dividers, or if any non-number characters
       return false if number.to_s =~ /[.,]\d{2}[.,]/ || number.to_s =~ /[^0-9,.]+/
 
       true