diff --git a/library/src/calculator_functions.cpp b/library/src/calculator_functions.cpp
index 83d9d26..7018fe8 100644
--- a/library/src/calculator_functions.cpp
+++ b/library/src/calculator_functions.cpp
@@ -39,7 +39,7 @@ QDateTime Calculator::GetDailyTicketDuration(Configuration* cfg, const QDateTime
 
     int daily_card_price = cfg->PaymentOption.find(payment_option)->second.pop_daily_card_price;
     if(daily_card_price <= 0) {
-        LOG_ERROR("Calculator::GetDailyTicketDuration(): Daily ticket price zero or less");
+        qCritical() << "Calculator::GetDailyTicketDuration(): Daily ticket price zero or less");
         return QDateTime();
     }