diff --git a/app/models/spree/preferences/preferable.rb b/app/models/spree/preferences/preferable.rb
index 91a14256af..34cf69e193 100644
--- a/app/models/spree/preferences/preferable.rb
+++ b/app/models/spree/preferences/preferable.rb
@@ -115,6 +115,7 @@ module Spree
         when :password
           value.to_s
         when :decimal
+          value = 0 if value.blank?
           BigDecimal(value.to_s).round(2, BigDecimal::ROUND_HALF_UP)
         when :integer
           value.to_i