diff --git a/library/src/calculator_functions.cpp b/library/src/calculator_functions.cpp
index edf4f71..5309bbc 100644
--- a/library/src/calculator_functions.cpp
+++ b/library/src/calculator_functions.cpp
@@ -4,6 +4,7 @@
 #include "tariff_log.h"
 #include "tariff_time_range.h"
 #include "ticket.h"
+#include "tariff_global_defines.h"
 
 #include <sstream>
 #include <algorithm>
@@ -590,24 +591,26 @@ std::string Calculator::GetDurationFromCost(Configuration* cfg,
 
 uint32_t Calculator::GetCostFromDuration(Configuration *cfg,
                                          QDateTime const &start,
-                                         quint64 timeStepInMinutes) const {
+                                         quint64 timeStepInMinutes,
+                                         int paymentOptionIndex) const {
     // for instance, a tariff as used in Schoenau, Koenigssee: only steps, no
     // special days, nonstop.
     static const PaymentMethod paymentMethodId = Utilities::getPaymentMethodId(cfg);
     if (paymentMethodId == PaymentMethod::Steps) {
         QDateTime const end = start.addSecs(timeStepInMinutes*60);
-        return GetCostFromDuration(cfg, start, end);
+        return GetCostFromDuration(cfg, start, end, paymentOptionIndex);
     }
     return 0;
 }
 
 uint32_t Calculator::GetCostFromDuration(Configuration * cfg,
                                          QDateTime const &start,
-                                         QDateTime const &end) const {
+                                         QDateTime const &end,
+                                         int paymentOptionIndex) const {
     static const PaymentMethod paymentMethodId = Utilities::getPaymentMethodId(cfg);
     if (paymentMethodId == PaymentMethod::Steps) {
         int const timeStepInMinutes = start.secsTo(end) / 60;
-        return GetPriceForTimeStep(cfg, timeStepInMinutes);
+        return GetPriceForTimeStep(cfg, timeStepInMinutes, paymentOptionIndex);
     }
     return 0;
 }