diff --git a/library/src/calculate_price.cpp b/library/src/calculate_price.cpp
index 2d3f4a5..2352aae 100644
--- a/library/src/calculate_price.cpp
+++ b/library/src/calculate_price.cpp
@@ -92,7 +92,7 @@ CalcState CALCULATE_LIBRARY_API compute_price_for_parking_ticket(
     double maxMin = tariff->PaymentOption.find(PaymentOption::Option1)->second.pop_max_time;
 
     if (minMin < 0 || maxMin < 0 || maxMin < minMin) {
-        calcState.setDesc(QString("minMin=%1, maxMin=%2").arg(minMin, maxMin));
+        calcState.setDesc(QString("minMin=%1, maxMin=%2").arg(minMin).arg(maxMin));
         return calcState.set(CalcState::State::WRONG_PARAM_VALUES);
     }
 
@@ -103,11 +103,11 @@ CalcState CALCULATE_LIBRARY_API compute_price_for_parking_ticket(
         return calcState.set(CalcState::State::NEGATIVE_PARING_TIME);
     }
     if (duration > maxMin) {
-        calcState.setDesc(QString("duration=%1, maxMin=%2").arg(duration, maxMin));
+        calcState.setDesc(QString("duration=%1, maxMin=%2").arg(duration).arg(maxMin));
         return calcState.set(CalcState::State::ABOVE_MAX_PARKING_TIME);
     }
     if (duration < minMin) {
-        calcState.setDesc(QString("duration=%1, minMin=%2").arg(duration, minMin));
+        calcState.setDesc(QString("duration=%1, minMin=%2").arg(duration).arg(minMin));
         return calcState.set(CalcState::State::BELOW_MIN_PARKING_TIME);
     }
     if (duration == 0) {
@@ -127,7 +127,7 @@ CalcState CALCULATE_LIBRARY_API compute_price_for_parking_ticket(
                         duration, false, true);
         double minCost = tariff->PaymentOption.find(PaymentOption::Option1)->second.pop_min_price;
         if (cost < minCost) {
-            calcState.setDesc(QString("minCost=%1, cost=%2").arg(minCost, cost));
+            calcState.setDesc(QString("minCost=%1, cost=%2").arg(minCost).arg(cost));
             return calcState.set(CalcState::State::BELOW_MIN_PARKING_PRICE);
         }
         price->units = cost;