diff --git a/library/src/calculate_price.cpp b/library/src/calculate_price.cpp
index ed5ebc9..cfd4c63 100644
--- a/library/src/calculate_price.cpp
+++ b/library/src/calculate_price.cpp
@@ -566,6 +566,7 @@ CalcState CALCULATE_LIBRARY_API compute_price_for_parking_ticket(
         time_t end_parking_time,    // netto time in minutes
         struct price_t *price,
         PermitType permitType) {    // permitType maps to product
+
     CalcState calcState;
 
     int const paymentOptionIndex = tariff->getPaymentOptionIndex(permitType.get());
@@ -633,7 +634,7 @@ CalcState CALCULATE_LIBRARY_API compute_price_for_parking_ticket(
 {
     CalcState calcState;
 
-    int paymentOptionIndex = tariff->getPaymentOptionIndex(start_parking_time);
+    int paymentOptionIndex = tariff->getPaymentOptionIndex(permitType);
 
     double minMin = tariff->getPaymentOptions(paymentOptionIndex).pop_min_time;
     double maxMin = tariff->getPaymentOptions(paymentOptionIndex).pop_max_time;
@@ -645,7 +646,8 @@ CalcState CALCULATE_LIBRARY_API compute_price_for_parking_ticket(
                 << "          netto_parking_time: " << netto_parking_time << endl
                 << "               start + netto: " << start_parking_time.addSecs(netto_parking_time * 60) << endl
                 << "                      minMin: " << minMin << endl
-                << "                      maxMin: " << maxMin;
+                << "                      maxMin: " << maxMin
+                << "                  permitType: " << permitType.toString();
 
 
     if (netto_parking_time < 0) {