diff --git a/library/src/calculate_price.cpp b/library/src/calculate_price.cpp
index 9aa0847..555511f 100644
--- a/library/src/calculate_price.cpp
+++ b/library/src/calculate_price.cpp
@@ -453,7 +453,7 @@ CalcState CALCULATE_LIBRARY_API compute_price_for_parking_ticket(
     if (duration < 0) {
         calcState.setDesc(QString("end=%1, start=%2")
                           .arg(end_parking_time, start_parking_time));
-        return calcState.set(CalcState::State::NEGATIVE_PARING_TIME);
+        return calcState.set(CalcState::State::NEGATIVE_PARKING_TIME);
     }
     if (duration > maxMin) {
         calcState.setDesc(QString("duration=%1, maxMin=%2").arg(duration).arg(maxMin));
@@ -521,7 +521,7 @@ CalcState CALCULATE_LIBRARY_API compute_price_for_parking_ticket(
         calcState.setDesc(QString("end=%1, start=%2")
                           .arg(end_parking_time.toString(Qt::ISODate),
                                start_parking_time.toString(Qt::ISODate)));
-        return calcState.set(CalcState::State::NEGATIVE_PARING_TIME);
+        return calcState.set(CalcState::State::NEGATIVE_PARKING_TIME);
     }
     if (netto_parking_time > maxMin) {
         calcState.setDesc(QString("duration=%1, maxMin=%2").arg(netto_parking_time).arg(maxMin));