diff --git a/library/src/calculate_price.cpp b/library/src/calculate_price.cpp
index 935b872..d43794a 100644
--- a/library/src/calculate_price.cpp
+++ b/library/src/calculate_price.cpp
@@ -327,6 +327,8 @@ int CALCULATE_LIBRARY_API get_maximal_parkingprice(Configuration *cfg,
     case PERMIT_TYPE::SHORT_TERM_PARKING: { // e.g. szeged (customer_281)
         if (paymentMethodId == PaymentMethod::Progressive || paymentMethodId == PaymentMethod::Steps) {
             maxPrice = Utilities::getMaximalParkingPrice(cfg, paymentMethodId);
+        } else if (paymentMethodId == PaymentMethod::Degressive) {
+            maxPrice = cfg->getPaymentOptions(paymentOptionIndex).pop_max_price;
         } else { // PaymentMethod::Linear -> e.g. szeged
             int const key = cfg->getPaymentOptions(paymentOptionIndex).pop_id;
             int const maxTime = cfg->getPaymentOptions(paymentOptionIndex).pop_max_time; // maxTime is given in minutes